Tootfinder

Weltraumteleskop James Webb: Spiralgalaxien viel zu früh "erwachsen" geworden
Galaxien wie unsere Milchstraße bilden eine Art Balken, wenn sie innerlich stabil und gewissermaßen "erwachsen" werden. Das passierte wohl früher als gedacht.

Weltraumteleskop James Webb: Spiralgalaxien viel zu früh "erwachsen" geworden
Galaxien wie unsere Milchstraße bilden eine Art Balken, wenn sie innerlich stabil und gewissermaßen "erwachsen" werden. Das passierte wohl früher als gedacht.

Weltraumteleskop James Webb findet Neutronenstern als Überrest von Supernova
Erstmals nach fast 400 Jahren war 1987 eine Supernova mit bloßem Auge sichtbar. Jetzt konnte bestätigt werden, was für ein Objekt dabei entstanden ist.

Spectroscopy of the binary #TNO Mors–Somnus with the JWST and its relationship to the cold classical and plutino subpopulations observed in the DiSCo-TNO project: https://www.aanda.org/articles/aa/abs/2024/01/aa48222-23/aa48222-23.html -> UCF Scientists Use James Webb Space Telescope to Uncover Clues About Neptune’s Evolution: https://www.ucf.edu/news/ucf-scientists-use-james-webb-space-telescope-to-uncover-clues-about-neptunes-evolution/ - Ana Carolina de Souza Feliciano and Noemí Pinilla-Alonso are part of a team that studies unique spectral properties of small celestial bodies beyond Neptune within the Kuiper Belt.

The Tip of the Red Giant Branch Distance Ladder and the Hubble Constant
Siyang Li, Rachael L. Beaton
https://arxiv.org/abs/2403.17048 https://

The Tip of the Red Giant Branch Distance Ladder and the Hubble Constant
While the tip of the red giant branch (TRGB) has been used as a distance indicator since the early 1990's, its application to measure the Hubble Constant as a primary distance indicator occurred only recently. The TRGB is also currently at an interesting crossroads as results from the James Webb Space Telescope (JWST) are beginning to emerge. In this chapter, we provide a review of the TRGB as it is used to measure the Hubble constant. First, we provide an essential review of the physical and o…

CDM and SIDM Interpretations of the Strong Gravitational Lensing Object JWST-ER1
Demao Kong, Daneng Yang, Hai-Bo Yu
https://arxiv.org/abs/2402.15840 https:…

CDM and SIDM Interpretations of the Strong Gravitational Lensing Object JWST-ER1
van Dokkum et al. (arXiv:2309.07969) reported the discovery of JWST-ER1, a strong lensing object at redshift $z\approx2$, using data from the James Webb Space Telescope. The lens mass within the Einstein ring is $5.9$ times higher than the expected stellar mass from a Chabrier initial mass function, indicating a high dark matter density. In this work, we show that a cold dark matter halo, influenced by gas-driven adiabatic contraction, can account for the observed lens mass. We also derive cons…

This https://arxiv.org/abs/2402.04230 has been replaced.
link: https://scholar.google.com/scholar?q=a

Medium Resolution 0.97-5.3 micron spectra of Very Young Benchmark Brown Dwarfs with NIRSpec onboard the James Webb Space Telescope
Spectra of young benchmark brown dwarfs with well-known ages are vital to characterize other brown dwarfs, for which ages are in general not known. These spectra are also crucial to test atmospheric models which have the potential to provide detailed information about the atmospheres of these objects. However, to optimally test atmospheric models, medium-resolution, long-wavelength coverage spectra with well-understood uncertainties are ideal, such as the spectra provided by the NIRSpec instrum…

The James Webb Interferometer: Space-based interferometric detections of PDS 70 b and c at 4.8 $\mu$m
Dori Blakely, Doug Johnstone, Gabriele Cugno, Anand Sivaramakrishnan, Peter Tuthill, Ruobing Dong, Benjamin J. S. Pope, Lo\"ic Albert, Max Charles, Rachel A. Cooper, Matthew De Furio, Louis Desdoigts, Ren\'e Doyon, Logan Francis, Alexandra Z. Greenbaum, David Lafreni\`ere, James P. Lloyd, Michael R. Meyer, Laurent Pueyo, Shrishmoy Ray, Joel S\'anchez-Berm\'udez, Anthon…

The James Webb Interferometer: Space-based interferometric detections of PDS 70 b and c at 4.8 $μ$m
We observed the planet-hosting system PDS 70 with the James Webb Interferometer, JWST's Aperture Masking Interferometric (AMI) mode within NIRISS. Observing with the F480M filter centered at 4.8 $μ$m, we simultaneously fit a geometric model to the outer disk and the two known planetary companions. We re-detect the protoplanets PDS 70 b and c at an SNR of 21 and 11, respectively. Our photometry of both PDS 70 b and c provide evidence for circumplanetary disk emission through fitting SED models …

This https://arxiv.org/abs/2401.04161 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Constraints on Supermassive Black Hole Binaries from JWST and NANOGrav
We use the recent statistics of dual active galactic nuclei (AGN) in the $James \ Webb \ Space \ Telescope$ (JWST) data at $z \sim 3.4$ to address two aspects of the feedback and evolution scenarios of supermassive black hole binaries (SMBHB). We find that the JWST data provide evidence for the members of a binary black hole being 'lit' at the same time, rather than independently -- a scenario which is consistent with gas-rich mergers being responsible for concurrent AGN activity. This conclusi…

Weltraumteleskop James Webb bestätigt mysteriöse Diskrepanz bei Hubble-Konstante
Als mit dem Weltraumteleskop James Webb die Arbeit seines Vorgängers zur Hubble-Konstante bestätigt wurden, wurden Zweifel laut. Die wurden jetzt ausgeräumt.

Which came first: Black holes or galaxies?
Black holes not only existed at the dawn of time, they birthed new stars and supercharged galaxy formation, a new analysis of James Webb Space Telescope data suggests.
https://phys.org/news/2024-02-black-holes-galaxies.html<…

Which came first: Black holes or galaxies?
Black holes not only existed at the dawn of time, they birthed new stars and supercharged galaxy formation, a new analysis of James Webb Space Telescope data suggests.

JWST MIRI Flight Performance: Imaging
Dan Dicken, Macarena Garc\'ia Mar\'in, Irene Shivaei, Pierre Guillard, Mattia Libralato, Alistair Glasse, Karl D. Gordon, Christophe Cossou, Patrick Kavanagh, Tea Temim, Nicolas Flagey, Pamela Klaassen, George H. Rieke, Gillian Wright, Stacey Alberts, Ruyman Azzollini, Javier \'Alvarez-M\'arquez, Patrice Bouchet, Stacey Bright, Misty Cracraft, Alain Coulais, Ors Hunor Detre, Mike Engesser, Ori D. Fox, Andras Gaspar, Ren\'e Gasta…

JWST MIRI Flight Performance: Imaging
The Mid-Infrared Instrument (MIRI) aboard the James Webb Space Telescope (JWST) provides the observatory with a huge advance in mid-infrared imaging and spectroscopy covering the wavelength range of 5 to 28 microns. This paper describes the performance and characteristics of the MIRI imager as understood during observatory commissioning activities, and through its first year of science operations. We discuss the measurements and results of the imager's point spread function, flux calibration, b…

A Strongly Lensed Dusty Starburst of an Intrinsic Disk Morphology at Photometric Redshift of 7.7
Chenxiaoji Ling, Bangzheng Sun, Cheng Cheng, Nan Li, Zhiyuan Ma, Haojing Yan
https://arxiv.org/abs/2402.16649

A Strongly Lensed Dusty Starburst of an Intrinsic Disk Morphology at Photometric Redshift of 7.7
We present COSBO-7, a strong millimeter (mm) source known for more than sixteen years but was just revealed its near-to-mid-IR counterpart by the James Webb Space Telescope (JWST). The precise pin-pointing by the Atacama Large Millimeter Array (ALMA) on the exquisite NIRCam and MIRI images show that it is a background source gravitationally lensed by a single foreground galaxy, and the analysis of its spectral energy distribution by different tools consistently derives its photometric redshift …

The Optical to Infrared $0.6-5.3\,{\rm \mu m}$ Dust Extinction Law of the Milky Way with JWST NIRSpec: Westerlund 2
Shu Wang, Xiaodian Chen
https://arxiv.org/abs/2402.17239

The Optical to Infrared $0.6-5.3\,{\rm μm}$ Dust Extinction Law of the Milky Way with JWST NIRSpec: Westerlund 2
The interstellar extinction law is important for interpreting observations and inferring the properties of interstellar dust grains. Based on the 993 prism/CLEAR spectra from the James Webb Space Telescope (JWST), we investigate $0.6-5.3\,{\rm μm}$ interstellar dust extinction law. We propose a pair method to obtain the reddening curves based only on JWST observed spectra. Most of the high extinction sources are toward the young star cluster Westerlund 2. The infrared (IR) $1.0-5.3\,{\rm μm}$…

Comparing transit spectroscopy pipelines at the catalogue level: evidence for systematic differences
Lorenzo V. Mugnai, Mark R. Swain, Raissa Estrela, Gael M. Roudier
https://arxiv.org/abs/2402.15803

Comparing transit spectroscopy pipelines at the catalogue level: evidence for systematic differences
The challenge of inconsistent results from different data pipelines, even when starting from identical data, is a recognized concern in exoplanetary science. As we transition into the James Webb Space Telescope (JWST) era and prepare for the ARIEL space mission, addressing this issue becomes paramount because of its implications on our understanding of exoplanets. Although comparing pipeline results for individual exoplanets has become more common, this study is the first to compare pipeline re…

Reconstructing Cosmic History: JWST-Extended Mapping of the Hubble Flow from z$ \sim $0 to z$ \sim$7.5 with HII Galaxies
Ricardo Ch\'avez, Roberto Terlevich, Elena Terlevich, Ana Gonz\'alez-Mor\'an, David Fern\'andez-Arenas, Fabio Bresolin, Manolis Plionis, Spyros Basilakos, Ricardo Amor\'in, Mario Llerena
https://

Reconstructing Cosmic History: JWST-Extended Mapping of the Hubble Flow from z$ \sim $0 to z$ \sim$7.5 with HII Galaxies
Over twenty years ago, Type Ia Supernovae (SNIa) [arXiv:astro-ph/9805201, arXiv:astro-ph/9812133] observations revealed an accelerating Universe expansion, suggesting a significant dark energy presence, often modelled as a cosmological constant, $Λ$. Despite its pivotal role in cosmology, the standard $Λ$CDM model remains largely underexplored in the redshift range between distant SNIa and the Cosmic Microwave Background (CMB). This study harnesses the James Webb Space Telescope's advanced ca…

Weltraumteleskop James Webb: Aufnahmen zeigen Sterne und Staub in 19 Galaxien
Das Weltraumteleskop James Webb kann nicht nur Sterne, sondern auch Staub und Gas in einer nie dagewesenen Detailfülle sichtbar machen. Das zeigen neue Bilder.

🪐 JWST data suggest exoplanet K2-18b may have molten surface rather than a watery ocean
#planets

JWST data suggest exoplanet K2-18b may have molten surface rather than a watery ocean
A multi-institutional team of astronomers, Earth scientists and planetary physicists has found evidence, via data from the James Webb Space Telescope (JWST), that some hycean exoplanets may have molten surfaces rather than watery oceans. In their study, published in The Astrophysical Journal Letters, the team analyzed data from JWST as it was focused on the hycean exoplanet K2-18b.

Kindling the First Stars II: Dependence of the Predicted PISN Rate on the Pop III Initial Mass Function
Alessa Ibrahim WigginsTCU, Mia Sauda BovillUniversity of Maryland, Louis-Gregory StrolgerSTScI, Massimo StiavelliSTScI, Cora BowlingTCU
https://arxiv.org/abs/2402.17076

Kindling the First Stars II: Dependence of the Predicted PISN Rate on the Pop III Initial Mass Function
Population III (Pop III) stars formed out of metal free gas in minihalos at $z>20$. While their ignition ended the Dark Ages and begin enrichment of the IGM, their mass distribution remains unconstrained. To date, no confirmed Pop III star has been observed and their direct detection is beyond the reach of the James Webb Space Telescope (JWST) without gravitational lensing. However, a subset of massive Pop III stars end their lives in pair instability supernova (PISN). With typical energies of …

Quantum study of the CH$_3^ $ photodissociation in full dimension Neural Networks potential energy surfaces
Pablo del Mazo-Sevillano, Alfredo Aguado, Javier R. Goicoechea, Octavio Roncero
https://arxiv.org/abs/2404.15032

Quantum study of the CH$_3^+$ photodissociation in full dimension Neural Networks potential energy surfaces
CH$_3^+$, a cornerstone intermediate in interstellar chemistry, has recently been detected for the first time by the James Webb Space Telescope. The photodissociation of this ion is studied here. Accurate explicitly correlated multi-reference configuration interaction {\it ab initio} calculations are done, and full dimensional potential energy surfaces are developed for the three lower electronic states, with a fundamental invariant neural network method. The photodissociation cross section is …

Universum verhält sich nicht nach unseren Formeln
https://stohl.de/wordpress/?p=188444

Universum verhält sich nicht nach unseren Formeln
Unsere schönen Formeln passen nun doch nicht zu Realität: Weltraumteleskop James Webb bestätigt mysteriöse Diskrepanz bei Hubble-Konstante. Der Physik-Nobelpreisträger Adam Riess meint dazu: Jetzt …

Weltraumteleskop James Webb: Kleine Galaxien haben frühen Kosmos freigeräumt
Während der Reionisierung wurde das Universum so lichtdurchlässig, wie wir es kennen. Welche Strukturen dafür verantwortlich waren, war unklar – bis jetzt.

JWST detection of a supernova associated with #GRB221009A without an r-process signature: https://www.nature.com/articles/s41550-024-02237-4 -> Brightest gamma-ray burst of all time came from the collapse of a massive star: https://news.northwestern.edu/stories/2024/04/brightest-gamma-ray-burst-of-all-time-came-from-the-collapse-of-a-massive-star/ - James Webb Space Telescope observations show no sign of heavy elements.

I saw "Deep Sky" with the little ones today and it was amazing. I teared up, but even my ten year old did! The doc is short but really well made, highly recommended if you have an opportunity to see it:
https://www.imax.com/news/deep-sky

Astronomers detect ‘waterworld with a boiling ocean’ in deep space
https://www.theguardian.com/science/2024/mar/08/astronomers-detect-waterworld-with-a-boiling-ocean-in-deep-space

Astronomie: Riesige Galaxienkollision schon 510 Millionen Jahre nach dem Urknall
Die Beobachtungen des Weltraumteleskops James Webb im besonders frühen Universum passen nicht zu den Theorien. Das gilt auch für zwei verschmelzende Galaxien.

This https://arxiv.org/abs/2401.02491 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

X-ray diagnostics of Cassiopeia A's "Green Monster": evidence for dense shocked circumstellar plasma
The recent survey of the core-collapse supernova remnant Cassiopeia A (CasA) with the MIRI instrument on board the James Webb Space Telescope (JWST) revealed a large structure in the interior region, referred to as the "Green Monster". Although its location suggests that it is an ejecta structure, the infrared properties of the "Green Monster" hint at a circumstellar medium (CSM) origin. In this companion paper to the JWST Cas A paper, we investigate the filamentary X-ray structures associated …

Kosmologie: Womöglich entstanden Galaxien gar nicht vor Schwarzen Löchern
Das Weltraumteleskop James Webb revolutioniert unser Verständnis von der Frühzeit des Kosmos. Das unterstreicht eine Studie zu den frühesten Schwarzen Löchern.
…

Compatibility of JWST results with exotic halos
Fabio Iocco, Luca Visinelli
https://arxiv.org/abs/2403.13068 https://arxiv.org/pdf/24…

Compatibility of JWST results with exotic halos
The James Webb Space Telescope (JWST) is unveiling astounding results about the first few hundred million years of life of the Universe, delivering images of galaxies at very high redshifts. Here, we develop a UV luminosity function model for high-redshift galaxies, considering parameters such as the stellar formation rate, dust extinction, and halo mass function. Calibration of this luminosity function model using UV luminosity data at redshifts z = 4-7 yields optimal parameter values. Testing…

GOALS-JWST: The Warm Molecular Outflows of the Merging Starburst Galaxy NGC 3256
Thomas Bohn, Hanae Inami, Aditya Togi, Lee Armus, Thomas S. -Y. Lai, Loreto Barcos-Munoz, Yiqing Song, Sean T. Linden, Jason Surace, Marina Bianchin, Vivian U, Aaron S. Evans, Torsten B\"oker, Matthew A. Malkan, Kirsten L. Larson, Sabrina Stierwalt, Victorine A. Buiten, Vassilis Charmandaris, Tanio Diaz-Santos, Justin H. Howell, George C. Privon, Claudio Ricci, Paul P. van der Werf, Susanne Aalto, Chr…

GOALS-JWST: The Warm Molecular Outflows of the Merging Starburst Galaxy NGC 3256
We present James Webb Space Telescope (JWST) Integral Field Spectrograph observations of NGC 3256, a local infrared-luminous late-stage merging system with two nuclei about 1 kpc apart, both of which have evidence of cold molecular outflows. Using JWST NIRSpec and MIRI datasets, we investigate this morphologically complex system on spatial scales of $<$100 pc, where we focus on the warm molecular H$_2$ gas surrounding the nuclei. We detect collimated outflowing warm H$_2$ gas originating from t…

MINDS: Mid-infrared atomic and molecular hydrogen lines in the inner disk around a low-mass star
Riccardo Franceschi, Thomas Henning, Beno\^it Tabone, Giulia Perotti, Alessio Caratti o Garatti, Giulio Bettoni, Ewine F. van Dishoeck, Inga Kamp, Olivier Absil, Manuel G\"udel, G\"oran Olofsson, L. B. F. M. Waters, Aditya M. Arabhavi, Valentin Christiaens, Danny Gasman, Sierra L. Grant, Hyerin Jang, Donna Rodgers-Lee, Matthias Samland, Kamber Schwarz, Milou Temmink, David Barrado…

MINDS: Mid-infrared atomic and molecular hydrogen lines in the inner disk around a low-mass star
This work aims to measure the mass accretion rate, the accretion luminosity, and more generally the physical conditions of the warm emitting gas in the inner disk of the very low-mass star 2MASS-J16053215-1933159. We investigate the source mid-infrared spectrum for atomic and molecular hydrogen line emission. We present the full James Webb Space Telescope (JWST) Mid-InfraRed Instrument (MIRI) Medium Resolution Spectrometer (MRS) spectrum of the protoplanetary disk around the very low-mass star …

This https://arxiv.org/abs/2311.09703 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Cosmological constraints on neutrino masses in light of JWST red and massive candidate galaxies
The overabundance of the red and massive candidate galaxies observed by the James Webb Space Telescope (JWST) implies efficient structure formation or large star formation efficiency at high redshift $z\sim 10$. In the scenario of a low or moderate star formation efficiency, because massive neutrinos tend to suppress the growth of structure of the universe, the JWST observation tightens the upper bound of the neutrino masses. Assuming $Λ$ cold dark matter cosmology and a star formation efficie…

This https://arxiv.org/abs/2312.12389 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

JWST Reveals a Surprisingly High Fraction of Galaxies Being Spiral-like at $0.5\leq z\leq4$
Spiral arms are one of the most important features used to classify the morphology of local galaxies. The cosmic epoch when spiral arms first appeared contains essential clues to the evolution of disk galaxies. In this letter, we used James Webb Space Telescope (JWST) images from the Cosmic Evolution Early Release Science Survey to visually identify spiral galaxies with redshift $0.5\leq z\leq4$ and stellar mass $\geq10^{10}\; M_\odot$. Out of 873 galaxies, 216 were found to have a spiral struc…

This https://arxiv.org/abs/2310.03245 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

JWST transmission spectroscopy of HD 209458b: a super-solar metallicity, a very low C/O, and no evidence of CH4, HCN, or C2H2
We present the transmission spectrum of the original transiting hot Jupiter HD\,209458b from 2.3 -- 5.1 $μ$m as observed with the NIRCam instrument on the James Webb Space Telescope (JWST). Previous studies of HD 209458b's atmosphere have given conflicting results on the abundance of H$_2$O and the presence of carbon- and nitrogen-bearing species, which have significant ramifications on the inferences of the planet's metallicity (M/H) and carbon-to-oxygen (C/O) ratio. We detect strong features…

Insights from #HST into Ultra-Massive #Galaxies and Early-Universe #Cosmology: #Webb telescope ‘break the universe’? Maybe not: #JWST is telling them.

Birth of Rapidly Spinning, Overmassive Black Holes in the Early Universe
Kohei Inayoshi, Kohei Ichikawa
https://arxiv.org/abs/2402.14706 https://

Birth of Rapidly Spinning, Overmassive Black Holes in the Early Universe
The James Webb Space Telescope (JWST) has unveiled numerous massive black holes (BHs) in faint, broad-line active galactic nuclei (AGNs). The discovery highlights the presence of dust-reddened AGN populations, referred to as little red dots (LRDs), more abundant than X-ray selected AGNs, which are less influenced by obscuration. This finding indicates that the cosmic growth rate of BHs within this population does not decrease but rather increases at higher redshifts beyond $z\sim 6$. The BH acc…

This https://arxiv.org/abs/2401.02491 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

X-ray diagnostics of Cassiopeia A's "Green Monster": evidence for dense shocked circumstellar plasma
The recent survey of the core-collapse supernova remnant Cassiopeia A (CasA) with the MIRI instrument on board the James Webb Space Telescope (JWST) revealed a large structure in the interior region, referred to as the "Green Monster". Although its location suggests that it is an ejecta structure, the infrared properties of the "Green Monster" hint at a circumstellar medium (CSM) origin. In this companion paper to the JWST Cas A paper, we investigate the filamentary X-ray structures associated …

This https://arxiv.org/abs/2401.06681 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

A JWST project on 47 Tucanae. Overview, photometry and early spectroscopic results of M dwarfs, and observation of brown dwarfs
The James Webb Space Telescope (JWST) observations have been demonstrated to be efficient in detecting globular clusters' (GCs) multiple stellar populations in the low mass regime of M dwarfs. We present an overview, and first results, of different projects that can be explored by using the JWST observations gathered under the GO2560 for 47 Tucanae, a first program entirely devoted to the investigation of multiple populations in very low mass stars, which includes spectroscopic data for the fai…

Birth of Rapidly Spinning, Overmassive Black Holes in the Early Universe
Kohei Inayoshi, Kohei Ichikawa
https://arxiv.org/abs/2402.14706 https://

Birth of Rapidly Spinning, Overmassive Black Holes in the Early Universe
The James Webb Space Telescope (JWST) has unveiled numerous massive black holes (BHs) in faint, broad-line active galactic nuclei (AGNs). The discovery highlights the presence of dust-reddened AGN populations, referred to as little red dots (LRDs), more abundant than X-ray selected AGNs, which are less influenced by obscuration. This finding indicates that the cosmic growth rate of BHs within this population does not decrease but rather increases at higher redshifts beyond $z\sim 6$. The BH acc…

Stacking X-ray Observations of "Little Red Dots": Implications for their AGN Properties
Minghao Yue, Anna-Christina Eilers, Tonima Tasnim Annana, Christos Panagiotou, Erin Kara, Takamitsu Miyaji
https://arxiv.org/abs/2404.13290

Stacking X-ray Observations of "Little Red Dots": Implications for their AGN Properties
Recent {\em James Webb Space Telescope (JWST)} observations have revealed a population of compact extragalactic objects at $z\gtrsim4$ with red near-infrared colors, which have been dubbed as ``Little Red Dots" (LRDs). The spectroscopically-selected LRDs exhibit broad H$α$ emission lines, which has led to the conclusion that type-I active galactic nuclei (AGN) are harbored in the galaxies' dust-reddened cores. However, other mechanisms, like strong outflowing winds, could also produce broad H$…

This https://arxiv.org/abs/2401.16648 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

JWST Observations of Starbursts: Polycyclic Aromatic Hydrocarbon Emission at the Base of the M 82 Galactic Wind
We present new observations of the central 1 kpc of the M 82 starburst obtained with the James Webb Space Telescope (JWST) near-infrared camera (NIRCam) instrument at a resolution ~0.05"-0.1" (~1-2 pc). The data comprises images in three mostly continuum filters (F140M, F250M, and F360M), and filters that contain [FeII] (F164N), H2 v=1-0 (F212N), and the 3.3 um PAH feature (F335M). We find prominent plumes of PAH emission extending outward from the central starburst region, together with a netw…

This https://arxiv.org/abs/2401.04161 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Constraints on Supermassive Black Hole Binaries from JWST and NANOGrav
We use the recent statistics of dual active galactic nuclei (AGN) in the $James \ Webb \ Space \ Telescope$ (JWST) data at $z \sim 3.4$ to address two aspects of the feedback and evolution scenarios of supermassive black hole binaries (SMBHB). We find that the JWST data provide evidence for the members of a binary black hole being 'lit' at the same time, rather than independently -- a scenario which is consistent with gas-rich mergers being responsible for concurrent AGN activity. This conclusi…

This https://arxiv.org/abs/2305.07049 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Insights from HST into Ultra-Massive Galaxies and Early-Universe Cosmology
The early-science observations made by the James Webb Space Telescope (JWST) have revealed an excess of ultra-massive galaxy candidates that appear to challenge the standard cosmological model ($Λ$CDM). Here, we argue that any modifications to $Λ$CDM that can produce such ultra-massive galaxies in the early Universe would also affect the UV galaxy luminosity function (UV LF) inferred from the Hubble Space Telescope (HST). The UV LF covers the same redshifts ($z\approx 7-10$) and host-halo mas…

Value Sliced and Derivative Images for Source Mask in JWST MIRI Photometry
Güray Hatipoğlu
https://arXiv.org/abs/2401.15779 https://a…

Value Sliced and Derivative Images for Source Mask in JWST MIRI Photometry
One of many ways for the James-Webb Space Telescope (JWST) to capture astronomical signals is the Mid-Infrared Instrument (MIRI) Imaging mode. To make this data ready for analysis, the JWST standard reduction pipeline has three stages and many mandatory and optional steps to produce analysis-ready data. At the end of stage 3, there is a resampled 2-dimensional image for each band/wavelength, an estimated source catalog, and a source mask (segmentation image) locating these sources. This study f…

Spectral Energy Distributions of Disc-Embedded Accreting Protoplanets
Nick Choksi, Eugene Chiang
https://arxiv.org/abs/2403.10057 https://

Spectral Energy Distributions of Disc-Embedded Accreting Protoplanets
Many dozens of protoplanetary discs show signatures of sculpting by planets. To help find these protoplanets by direct imaging, we compute their broadband spectral energy distributions, which overlap with the JWST (James Webb Space Telescope) and ALMA (Atacama Large Millimeter Array) passbands. We consider circumplanetary spherical envelopes, and combinations of circumplanetary discs and envelopes, heated by protoplanet accretion and external irradiation. Searches with JWST's NIRCam (Near-Infra…

Reionization after JWST: a photon budget crisis?
Julian B. Mu\~noz, Jordan Mirocha, John Chisholm, Steven R. Furlanetto, Charlotte Mason
https://arxiv.org/abs/2404.07250

Reionization after JWST: a photon budget crisis?
New James Webb Space Telescope (JWST) observations are revealing the first galaxies to be prolific producers of ionizing photons, which we argue gives rise to a tension between different probes of reionization. For hydrogen reionization to proceed there must be enough ionizing photons for all of the hydrogen atoms, including their recombinations. Over the last two decades a consensus has emerged where star-forming galaxies are able to generate these photons, given reasonable values for their nu…

This https://arxiv.org/abs/2401.09981 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

A Census of Photometrically Selected Little Red Dots at 4 < z < 9 in JWST Blank Fields
Observations with the James Webb Space Telescope (JWST) have uncovered numerous faint active galactic nuclei (AGN) at $z\sim5$ and beyond. These objects are key to our understanding of the formation of supermassive black holes (SMBHs), their co-evolution with host galaxies, as well as the role of AGN in cosmic reionization. Using photometric colors and size measurements, we perform a search for compact red objects in an array of blank deep JWST/NIRCam fields totaling $\sim340$ arcmin$^{2}$. Our…

First Result for Dark Matter Search by WINERED
Wen Yin, Taiki Bessho, Yuji Ikeda, Hitomi Kobayashi, Daisuke Taniguchi, Hiroaki Sameshima, Noriyuki Matsunaga, Shogo Otsubo, Yuki Sarugaku, Tomomi Takeuchi, Haruki Kato, Satoshi Hamano, Hideyo Kawakita
https://arxiv.org/abs/2402.07976

First Result for Dark Matter Search by WINERED
The identity of dark matter has been a mystery in astronomy, cosmology, and particle theory for about a century. Bessho, Ikeda, and Yin (2022), three of the current authors, proposed using the state-of-the-art infrared spectrographs, including WINERED at $6.5$m Magellan Clay telescope and NIRSpec at James Webb Space Telescope, as efficient detectors for the indirect detection of dark matter with the mass around eV by measuring the line photons from the dark matter two body decays. Applying this…

PDRs4All IX. Sulfur elemental abundance in the Orion Bar
Asunci\'on Fuente, Evelyne Roueff, Franck Le Petit, Jacques Le Bourlot, Emeric Bron, Mark G. Wolfire, James F. Babb, Pei-Gen Yan, Takashi Onaka, John H. Black, Ilane Schroetter, Dries Van De Putte, Ameek Sidhu, Am\'elie Canin, Boris Trahin, Felipe Alarc\'on, Ryan Chown, Olga Kannavou, Olivier Bern\'e, Emilie Habart, Els Peeters, Javier R. Goicoechea, Marion Zannese, Raphael Meshaka, Yoko Okada, Markus R\"olli…

PDRs4All IX. Sulfur elemental abundance in the Orion Bar
One of the main problems in astrochemistry is determining the amount of sulfur in volatiles and refractories in the interstellar medium. The detection of the main sulfur reservoirs (icy H$_2$S and atomic gas) has been challenging, and estimates are based on the reliability of models to account for the abundances of species containing less than 1% of the total sulfur. The high sensitivity of the James Webb Space Telescope provides an unprecedented opportunity to estimate the sulfur abundance thr…

JWST Spectrophotometry of the Small Satellites of Uranus and Neptune
Matthew Belyakov, M. Ryleigh Davis, Zachariah Milby, Ian Wong, Michael E. Brown
https://arxiv.org/abs/2404.06660

JWST Spectrophotometry of the Small Satellites of Uranus and Neptune
We use 1.4-4.6 micron multi-band photometry of the small inner Uranian and Neptunian satellites obtained with the James Webb Space Telescope's near-infrared imager NIRCam to characterize their surface compositions. We find that the satellites of the ice giants have, to first-order, similar compositions to one another, with a 3.0 micron absorption feature possibly associated with an O-H stretch, indicative of water ice or hydrated minerals. Additionally, the spectrophotometry for the small ice g…

MOSEL survey: Spatially offset Lyman-continuum emission in a new emitter at z=3.088
Anshu Gupta, Cathryn M. Trott, Ravi Jaiswar, E. V. Ryan-Weber, Andrew J. Bunker, Ayan Acharyya, Alex J. Cameron, Ben Forrest, Glenn G. Kacprzak, Themiya Nanayakkara, Kim-Vy Tran, Aman Chokshi
https://arxiv.org/abs/2403.13285

MOSEL survey: Spatially offset Lyman-continuum emission in a new emitter at z=3.088
We present the discovery of a unique Lyman-continuum (LyC) emitter at z=3.088. The LyC emission were detected using the Hubble Space Telescope (HST) WFC3/UVIS F336W filter, covering a rest-frame wavelength range of 760-900 Angstrom. The peak signal-to-noise ratio (SNR) of LyC emission is 3.9 in a r=0.24'' aperture and is spatially offset by 0.29''+/-0.04'' (~ 2.2+/-0.3 kpc) from the rest-UV emission peak (F606W). By combining imaging and spectroscopic data from the James Webb Space Telescope (J…

The haloes that reionized the Universe
Nachiket Joshi (IIT Bhilai), Mahavir Sharma (IIT Bhilai)
https://arxiv.org/abs/2403.12132 https://

The haloes that reionized the Universe
We study the reionization of the Universe due to haloes that host galaxies undergoing bursts of star formation. By comparing the recent results from the James Webb Space Telescope (JWST) with the cosmological hydrodynamical simulation EAGLE at $z\ge 6$, we find that bursty galaxies have specific star formation rate, sSFR $>10^{-2}$ Myr$^{-1}$, and magnitude, $M_{\rm UV}\leq -17$. Most of them reside in haloes of mass $\sim 10^9$ M$_\odot$ and some in more massive haloes. We then construct the m…

SN H0pe: The First Measurement of $H_0$ from a Multiply-Imaged Type Ia Supernova, Discovered by JWST
Massimo Pascale, Brenda L. Frye, Justin D. R. Pierel, Wenlei Chen, Patrick L. Kelly, Seth H. Cohen, Rogier A. Windhorst, Adam G. Riess, Patrick S. Kamieneski, Jose M. Diego, Ashish K. Meena, Sangjun Cha, Masamune Oguri, Adi Zitrin, M. James Jee, Nicholas Foo, Reagen Leimbach, Anton M. Koekemoer, C. J. Conselice, Liang Dai, Ariel Goobar, Matthew R. Siebert, Lou Strolger, S. P. Willner

SN H0pe: The First Measurement of $H_0$ from a Multiply-Imaged Type Ia Supernova, Discovered by JWST
The first James Webb Space Telescope ({\it JWST}) Near InfraRed Camera (NIRCam) imaging in the field of the galaxy cluster PLCK G165.7+67.0 ($z=0.35$) uncovered a Type Ia supernova (SN~Ia) at $z=1.78$, called ``SN H0pe." Three different images of this one SN were detected as a result of strong gravitational lensing, each one traversing a different path in spacetime, thereby inducing a relative delay in the arrival of each image. Follow-up {\it JWST} observations of all three SN images enabled p…

Extreme-value modelling of the brightest galaxies at $z\gtrsim9$
Cameron Heather, Teeraparb Chantavat, Siri Chongchitnan, Joseph Silk
https://arxiv.org/abs/2404.11567

Extreme-value modelling of the brightest galaxies at $z\gtrsim9$
Data from the James Webb Space Telescope have revealed an intriguing population of bright galaxies at high redshifts. In this work, we use extreme-value statistics to calculate the distribution (in UV magnitude) of the brightest galaxies in the redshift range $9 \lesssim z \lesssim 16$. We combine the Generalised Extreme Value (GEV) approach with modelling of the galaxy luminosity function. We obtain predictions of the brightest galaxies for a suite of luminosity functions, including the Schech…

This https://arxiv.org/abs/2310.11499 has been replaced.
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The JWST Early Release Science Program for Direct Observations of Exoplanetary Systems IV: NIRISS Aperture Masking Interferometry Performance and Lessons Learned
We present a performance analysis for the aperture masking interferometry (AMI) mode on board the James Webb Space Telescope Near Infrared Imager and Slitless Spectrograph (JWST/NIRISS). Thanks to self-calibrating observables, AMI accesses inner working angles down to and even within the classical diffraction limit. The scientific potential of this mode has recently been demonstrated by the Early Release Science (ERS) 1386 program with a deep search for close-in companions in the HIP 65426 exop…

Detection of ionized hydrogen and oxygen from a very luminous and young galaxy 13.4 billion years ago
Jorge A. Zavala, Marco Castellano, Hollis B. Akins, Tom J. L. C. Bakx, Denis Burgarella, Caitlin M. Casey, \'Oscar A. Ch\'avez Ortiz, Mark Dickinson, Steven L. Finkelstein, Ikki Mitsuhashi, Kimihiko Nakajima, Pablo G. P\'erez-Gonz\'alez, Pablo Arrabal Haro, Veronique Buat, Bren Backhaus, Antonello Calabr\`o, Nikko J. Cleri, David Fern\'andez-Arenas, Adriano Fontana,…

Detection of ionized hydrogen and oxygen from a very luminous and young galaxy 13.4 billion years ago
The James Webb Space Telescope (JWST) has discovered a surprising population of bright galaxies in the very early universe (< 500 Myrs after the Big Bang) that is hard to explain with conventional galaxy formation models and whose physical properties remain to be fully understood. Insight into the internal physics of galaxies is captured best via observations of excited-state atomic transitions of ionized gas, but beyond z~7-9, the brightest spectral signatures are redshifted into the mid-infra…

This https://arxiv.org/abs/2401.04777 has been replaced.
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Reconnaissance with JWST of the J-region Asymptotic Giant Branch in Distance Ladder Galaxies: From Irregular Luminosity Functions to Approximation of the Hubble Constant
We study stars in the J-regions of the asymptotic giant branch (JAGB) of near-infrared color magnitude diagrams in the maser host NGC 4258 and 4 hosts of 6 Type Ia supernovae (SN Ia): NGC 1448, NGC 1559, NGC 5584, and NGC 5643. These clumps of stars are readily apparent near $1.0

This https://arxiv.org/abs/2401.04777 has been replaced.
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Reconnaissance with JWST of the J-region Asymptotic Giant Branch in Distance Ladder Galaxies: From Irregular Luminosity Functions to Approximation of the Hubble Constant
We study stars in the J-regions of the asymptotic giant branch (JAGB) of near-infrared color magnitude diagrams in the maser host NGC 4258 and 4 hosts of 6 Type Ia supernovae (SN Ia): NGC 1448, NGC 1559, NGC 5584, and NGC 5643. These clumps of stars are readily apparent near $1.0

The Geochemical Potential for Metabolic Processes on the Sub-Neptune Exoplanet K2-18b
Christopher R. Glein
https://arxiv.org/abs/2403.03918 https://…

The Geochemical Potential for Metabolic Processes on the Sub-Neptune Exoplanet K2-18b
Quantifying disequilibria is important to understand whether an environment could be habitable. It has been proposed that the exoplanet K2-18b has a hydrogen-rich atmosphere and a water ocean, making it a "hycean world". The James Webb Space Telescope recently made measurements of methane, CO$_2$, and possibly dimethyl sulfide (DMS) in the atmosphere of this planet. The initial interpretation of these data is that they may support the occurrence of hycean conditions. Here, I attempt to take a n…

Weak gravitational lensing measurements of Abell 2744 using JWST and shear measurement algorithm pyRRG-JWST
David R. Harvey, Richard Massey
https://arXiv.org/abs/2401.16478

Weak gravitational lensing measurements of Abell 2744 using JWST and shear measurement algorithm pyRRG-JWST
We update the publicly available weak lensing shear measurement algorithm pyRRG for the James Webb Space Telescope, and apply it to UNCOVER DR1 imaging of galaxy cluster Abell 2744. At short wavelengths (< 2.5$μ$m), shear measurements are consistent between independent observations through different JWST bandpasses, and calibrated within 1.5% of those from the Hubble Space Telescope. At longer wavelengths, shear is underestimated by ~5%, probably due to coarser pixellisation. We model the spat…

This https://arxiv.org/abs/2312.04899 has been replaced.
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Morphology of Galaxies in JWST Fields: Initial Distribution and Evolution of Galaxy Morphology
A recent study from the Horizon Run (HR5) cosmological simulation has predicted that galaxies with ${\rm log}~M_{\ast}/M_{\odot}\lesssim 10$ in the cosmic morning ($10\gtrsim z\gtrsim 4$) dominantly have disk-like morphology in the $Λ$CDM universe, which is driven by the tidal torque in the initial matter fluctuations. For a direct comparison with observation, we identify a total of about $19,000$ James Webb Space Telescope (JWST) galaxies with ${\rm log}~M_{\ast}/M_{\odot}>9$ at $z=0.6-8.0$ u…

This https://arxiv.org/abs/2312.04899 has been replaced.
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Morphology of Galaxies in JWST Fields: Initial Distribution and Evolution of Galaxy Morphology
A recent study from the Horizon Run (HR5) cosmological simulation has predicted that galaxies with ${\rm log}~M_{\ast}/M_{\odot}\lesssim 10$ in the cosmic morning ($10\gtrsim z\gtrsim 4$) dominantly have disk-like morphology in the $Λ$CDM universe, which is driven by the tidal torque in the initial matter fluctuations. For a direct comparison with observation, we identify a total of about $19,000$ James Webb Space Telescope (JWST) galaxies with ${\rm log}~M_{\ast}/M_{\odot}>9$ at $z=0.6-8.0$ u…

JWST Photometric Time-Delay and Magnification Measurements for the Triply-Imaged Type Ia "Supernova H0pe" at z = 1.78
J. D. R. Pierel, B. L. Frye, M. Pascale, G. B. Caminha, W. Chen, S. Dhawan, D. Gilman, M. Grayling, S. Huber, P. Kelly, S. Thorp, N. Arendse, S. Birrer, M. Bronikowski, R. Canameras, D. Coe, S. H. Cohen, C. J. Conselice, S. P. Driver, J. C. J. Dsilva, M. Engesser, N. Foo, C. Gall, N. Garuda, C. Grillo, N. A. Grogin, J. Henderson, J. Hjorth, R. A. Jansen, J. Jo…

JWST Photometric Time-Delay and Magnification Measurements for the Triply-Imaged Type Ia "Supernova H0pe" at z = 1.78
Supernova (SN) H0pe is a gravitationally lensed, triply-imaged, Type Ia SN (SN Ia) discovered in James Webb Space Telescope imaging of the PLCK G165.7+67.0 cluster of galaxies. Well-observed multiply-imaged SNe provide a rare opportunity to constrain the Hubble constant ($H_0$), by measuring the relative time delay between the images and modeling the foreground mass distribution. SN H0pe is located at $z=1.783$, and is the first SN Ia with sufficient light curve sampling and long enough time de…

Imaging of I Zw 18 by JWST: I. Strategy and First Results of Dusty Stellar Populations
Alec S. Hirschauer, Nicolas Crouzet, Nolan Habel, Laura Lenki\'c, Conor Nally, Olivia C. Jones, Giacomo Bortolini, Martha L. Boyer, Kay Justtanont Margaret Meixner, G\"oran \"Ostlin, Gillian S. Wright, Ruyman Azzollini, Joris A. D. L. Blommaert, Bernhard Brandl, Leen Decin, Omnarayani Nayak, Pierre Royer, B. A. Sargent, Paul van der Werf

Imaging of I Zw 18 by JWST: I. Strategy and First Results of Dusty Stellar Populations
We present a James Webb Space Telescope (JWST) imaging survey of I Zw 18, the archetypal extremely metal-poor, star-forming, blue compact dwarf galaxy. With an oxygen abundance of only $\sim$3% $Z_{\odot}$, it is among the lowest-metallicity systems known in the local universe, and is, therefore, an excellent accessible analog for the galactic building blocks which existed at early epochs of ionization and star formation. These JWST data provide a comprehensive infrared (IR) view of I Zw 18 wit…

The NIRSpec Wide GTO Survey
Michael V. Maseda, Anna de Graaff, Marijn Franx, Hans-Walter Rix, Stefano Carniani, Isaac Laseter, Ugne Dudzeviciute, Tim Rawle, Eleonora Parlanti, Santiago Arribas, Andrew J. Bunker, Alex J. Cameron, Stephane Charlot, Mirko Curti, Francesco D'Eugenio, Gareth C. Jones, Nimisha Kumari, Roberto Maiolino, Hannah Uebler, Aayush Saxena, Renske Smit, Chris Willott, Joris Witstok

The NIRSpec Wide GTO Survey
The Near-infrared Spectrograph (NIRSpec) on the James Webb Space Telescope is uniquely suited to studying galaxies in the distant Universe with its combination of multi-object capabilities and sensitivity over a large range in wavelength (0.6-5.3 microns). Here we present the NIRSpec Wide survey, part of the NIRSpec Instrument Science Team's Guaranteed Time Observations, using NIRSpec's microshutter array to obtain spectra of more than 3200 galaxies at $z>1$ at both low- and high-resolution ($R…

Revealing Callisto's carbon-rich surface and CO2 atmosphere with JWST
Richard J. Cartwright, Geronimo L. Villanueva, Bryan J. Holler, Maria Camarca, Sara Faggi, Marc Neveu, Lorenz Roth, Ujjwal Raut, Christopher R. Glein, Julie C. Castillo-Rogez, Michael J. Malaska, Dominique Bockelee-Morvan, Tom A. Nordheim, Kevin P. Hand, Giovanni Strazzulla, Yvonne J. Pendleton, Katherine de Kleer, Chloe B. Beddingfield, Imke de Pater, Dale P. Cruikshank, Silvia Protopapa

Revealing Callisto's carbon-rich surface and CO2 atmosphere with JWST
We analyzed spectral cubes of Callisto's leading and trailing hemispheres, collected with the NIRSpec Integrated Field Unit (G395H) on the James Webb Space Telescope. These spatially resolved data show strong 4.25-micron absorption bands resulting from solid-state 12CO2, with the strongest spectral features at low latitudes near the center of its trailing hemisphere, consistent with radiolytic production spurred by magnetospheric plasma interacting with native H2O mixed with carbonaceous compou…

Infrared Emission of Specific Polycyclic Aromatic Hydrocarbon Molecules: Indene
Kaijun Li, Aigen Li, Xuejuan Yang, Taotao Fang
https://arxiv.org/abs/2403.05603

Infrared Emission of Specific Polycyclic Aromatic Hydrocarbon Molecules: Indene
Polycyclic aromatic hydrocarbon (PAH) molecules have long been suggested to be present in the interstellar medium (ISM). Nevertheless, despite their expected ubiquity and sustained searching efforts, identifying specific interstellar PAH molecules from their infrared (IR) spectroscopy has so far been unsuccessful. However, due to its unprecedented sensitivity, the advent of the James Webb Space Telescope (JWST) may change this. Meanwhile, recent years have witnessed breakthroughs in detecting s…

This https://arxiv.org/abs/2401.13733 has been replaced.
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Is GN-z11 powered by a super-Eddington massive black hole?
Observations of $z \sim 6$ quasars powered by supermassive black holes (SMBHs; $M_{\rm BH} \sim 10^{8-10}\, M_\odot$) challenge our current understanding of early black hole (BH) formation and evolution. The advent of the James Webb Space Telescope (JWST) has enabled the study of massive BHs (MBHs; $M_{\rm BH}\sim 10^{6-7} \ \mathrm{M}_\odot$) up to $z\sim 11$, thus bridging the properties of $z\sim 6$ quasars to their ancestors. The JWST spectroscopic observations of GN-z11, a well-known $z=10…

This https://arxiv.org/abs/2306.09142 has been replaced.
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GN-z11: The environment of an AGN at $z=$10.603
Recent observations with the \textit{James Webb} Space Telescope (JWST) have further refined the spectroscopic redshift of GN-z11, one of the most distant galaxies identified with the \textit{Hubble} Space Telescope (HST) at $z=10.603$. The presence of extremely dense gas ($>10^{10}$ cm$^{-3}$), the detection of high-ionisation lines and of CII*1335 emission, as well as the presence of an ionisation cone, indicate that GN-z11 also hosts an Active Galactic Nucleus (AGN). Further photometric and …

This https://arxiv.org/abs/2306.09142 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

GN-z11: The environment of an AGN at $z=$10.603
Recent observations with the \textit{James Webb} Space Telescope (JWST) have further refined the spectroscopic redshift of GN-z11, one of the most distant galaxies identified with the \textit{Hubble} Space Telescope (HST) at $z=10.603$. The presence of extremely dense gas ($>10^{10}$ cm$^{-3}$), the detection of high-ionisation lines and of CII*1335 emission, as well as the presence of an ionisation cone, indicate that GN-z11 also hosts an Active Galactic Nucleus (AGN). Further photometric and …

Physical Pathways for JWST-Observed Supermassive Black Holes in the Early Universe
Junehyoung Jeon, Volker Bromm, Boyuan Liu, Steven L. Finkelstein
https://arxiv.org/abs/2402.18773

Physical Pathways for JWST-Observed Supermassive Black Holes in the Early Universe
Observations with the James Webb Space Telescope (JWST) have revealed active galactic nuclei (AGN) powered by supermassive black holes with estimated masses of $10^7-10^8$ M$_\odot$ at redshifts $z\sim7-9$. Some reside in overmassive systems with higher AGN to stellar mass ratios than locally. Understanding how massive black holes could form so early in cosmic history and affect their environment to establish the observed relations today are some of the major open questions in astrophysics and …

This https://arxiv.org/abs/2401.16648 has been replaced.
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JWST Observations of Starbursts: Polycyclic Aromatic Hydrocarbon Emission at the Base of the M 82 Galactic Wind
We present new observations of the central 1 kpc of the M 82 starburst obtained with the James Webb Space Telescope (JWST) near-infrared camera (NIRCam) instrument at a resolution ~0.05"-0.1" (~1-2 pc). The data comprises images in three mostly continuum filters (F140M, F250M, and F360M), and filters that contain [FeII] (F164N), H2 v=1-0 (F212N), and the 3.3 um PAH feature (F335M). We find prominent plumes of PAH emission extending outward from the central starburst region, together with a netw…

JWST Observations of Starbursts: Polycyclic Aromatic Hydrocarbon Emission at the base of the M 82 Galactic Wind
Alberto D. Bolatto, Rebecca C. Levy, Elizabeth Tarantino, Martha L. Boyer, Deanne B. Fisher, Adam K. Leroy, Serena A. Cronin, Ralf S. Klessen, J. D. Smith, Dannielle A. Berg, Torsten Boeker, Leindert A. Boogaard, Eve C. Ostriker, Todd A. Thompson, Juergen Ott, Laura Lenkic, Laura A. Lopez, Daniel A. Dale, Sylvain Veilleux, Paul P. van der Werf, Simon C. O. Glover, Karin M. Sa…

JWST Observations of Starbursts: Polycyclic Aromatic Hydrocarbon Emission at the base of the M 82 Galactic Wind
We present new observations of the central 1 kpc of the M 82 starburst obtained with the James Webb Space Telescope (JWST) near-infrared camera (NIRCam) instrument at a resolution ~0.05"-0.1" (~1-2 pc). The data comprises images in three mostly continuum filters (F140M, F250M, and F360M), and filters that contain [FeII] (F164N), H2 v=1-0 (F212N), and the 3.3 um PAH feature (F335M). We find prominent plumes of PAH emission extending outward from the central starburst region, together with a netw…

FOOD I: A New Division Scheme For The Stelliferous Era
Stephen M. Wilkins, Sophie L. Newman, Will J. Roper
https://arxiv.org/abs/2403.20144 https://…

FOOD I: A New Division Scheme For The Stelliferous Era
In recent years the James Webb Space Telescope has enabled the frontier of observational galaxy formation to push to ever higher redshift, deep within cosmic dawn. However, what is high-redshift, and when was cosmic dawn? While widely used, these terms (as well as many other confusing terms) are not consistently defined in the literature; this both hampers effective communication but also impedes our ability to precisely characterize and understand the phenomena under investigation. In this art…

This https://arxiv.org/abs/2402.15840 has been replaced.
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CDM and SIDM Interpretations of the Strong Gravitational Lensing Object JWST-ER1
van Dokkum et al. (arXiv:2309.07969) reported the discovery of JWST-ER1, a strong lensing object at redshift $z\approx2$, using data from the James Webb Space Telescope. The lens mass within the Einstein ring is $5.9$ times higher than the expected stellar mass from a Chabrier initial mass function, indicating a high dark matter density. In this work, we show that a cold dark matter halo, influenced by gas-driven adiabatic contraction, can account for the observed lens mass. We interpret the me…

This https://arxiv.org/abs/2309.05713 has been replaced.
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GA-NIFS: Early-stage feedback in a heavily obscured AGN at $z=4.76$
Dust-obscured galaxies are thought to represent an early evolutionary phase of massive galaxies in which the active galactic nucleus (AGN) is still deeply buried in significant amounts of dusty material and its emission is strongly suppressed. The unprecedented sensitivity of the James Webb Space Telescope enables us for the first time to detect the rest-frame optical emission of heavily obscured AGN and unveil the properties of the hidden accreting super-massive black holes (BHs). In this work…

This https://arxiv.org/abs/2309.05713 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

GA-NIFS: Early-stage feedback in a heavily obscured AGN at $z=4.76$
Dust-obscured galaxies are thought to represent an early evolutionary phase of massive galaxies in which the active galactic nucleus (AGN) is still deeply buried in significant amounts of dusty material and its emission is strongly suppressed. The unprecedented sensitivity of the James Webb Space Telescope enables us for the first time to detect the rest-frame optical emission of heavily obscured AGN and unveil the properties of the hidden accreting super-massive black holes (BHs). In this work…

This https://arxiv.org/abs/2311.05394 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Remarkably Compact Quiescent Candidates at $3
In this letter, we measure the rest-frame optical and near-infrared sizes of ten quiescent candidates at $3