Tootfinder

Dissociation and destruction of PAHs and PAH clusters induced by absorption of X-rays in protoplanetary discs around T Tauri stars
K. Lange, C. Dominik, A. G. G. M. Tielens
https://arxiv.org/abs/2508.17847

Dissociation and destruction of PAHs and PAH clusters induced by absorption of X-rays in protoplanetary discs around T Tauri stars
Only 8% of the protoplanetary discs orbiting a T Tauri star show emission features of polycyclic aromatic hydrocarbons (PAHs). As PAHs are strong absorbers of UV radiation, they contribute to the heating of the discs photosphere, shielding of UV radiation that drives photo-chemistry in the disc, and their abundance is a key parameter to determine the strength of photo-evaporative disc winds. We want to understand the photochemical evolution of PAHs in protoplanetary discs around T Tauri stars a…

Compact Ionized Gas Region Surrounded by Porous Neutral Gas in a Dusty Lyman Break Galaxy at Redshift $z=8.312$
Masato Hagimoto, Yoichi Tamura, Akio K. Inoue, Hideki Umehata, Tom J. L. C. Bakx, Takuya Hashimoto, Ken Mawatari, Yuma Sugahara, Yoshinobu Fudamoto, Yuichi Harikane, Hiroshi Matsuo, Akio Taniguchi
https://arxiv.org/abs…

Compact Ionized Gas Region Surrounded by Porous Neutral Gas in a Dusty Lyman Break Galaxy at Redshift $z=8.312$
Porous interstellar medium (ISM) structure in galaxies at the epoch of reionization (EoR) gives us a hint to understand what types of galaxies contribute to reionization. Although recent studies have pointed out the positive correlation between high ionizing photon escape fractions and high [O III] $88~μ\mathrm{m}$-to-[C II] $158~μ\mathrm{m}$ ratios found in UV-luminous star-forming galaxies at $z > 6$ with ALMA, previous studies have paid little attention to the neutral gas porosity that all…

JADES: Carbon-enhanced, Nitrogen-normal compact galaxy at z=11.2
J. Scholtz, M. S. Silcock, E. Curtis-Lake, R. Maiolino, S. Carniani, F. D'Eugenio, X. Ji, P. Jakobsen, K. Hainline, S. Arribas, W. M. Baker, R. Bhatawdekar, A. J. Bunker, S. Charlot, J. Chevallard, M. Curti, Daniel J. Eisenstein, Y. Isobe, G. C. Jones, E. Parlanti, P. G. P\'erez-Gonz\'alez, P. Rinaldi, B. Robertson, S. Tacchella, H. \"Ubler, C. C. Williams, C. Willott, J. Witstok

JADES: Carbon-enhanced, Nitrogen-normal compact galaxy at z=11.2
Over the past few years \textit{JWST} has been a major workhorse in detecting and constraining the metal enrichment of the first galaxies in the early Universe and finding the source of the ionisation of their interstellar medium. In this work, we present new deep JWST/NIRSpec spectroscopy of GS-z11-1, a galaxy at z = 11.28, in which we report the detection of multiple rest-frame UV and optical emission lines: CIII]$λλ$1907,09, CIV]$λλ$1548,51, [OII]$λλ$3726,29, [NeIII]$λ$3869, H$γ$ and…

Distinguishing symmetric digraphs by proper arc-colourings of type I
Rafa{\l} Kalinowski, Monika Pil\'sniak, Magdalena Prorok
https://arxiv.org/abs/2506.13979

Distinguishing symmetric digraphs by proper arc-colourings of type I
A symmetric digraph $\overleftrightarrow{G}$ is obtained from a simple graph $G$ by replacing each edge $uv$ with a pair of opposite arcs $\vec{uv}$, $\overrightarrow{vu}$. An arc-colouring $c$ of a digraph $\overleftrightarrow{G}$ is distinguishing if the only automorphism of $\overleftrightarrow{G}$ preserving the colouring $c$ is the identity. Behzad introduced the proper arc-colouring of type I as an arc-colouring such that any two consecutive arcs $\overrightarrow{uv}$, $\overrightarrow{vw…

Dream, Lift, Animate: From Single Images to Animatable Gaussian Avatars
Marcel C. B\"uhler, Ye Yuan, Xueting Li, Yangyi Huang, Koki Nagano, Umar Iqbal
https://arxiv.org/abs/2507.15979

Dream, Lift, Animate: From Single Images to Animatable Gaussian Avatars
We introduce Dream, Lift, Animate (DLA), a novel framework that reconstructs animatable 3D human avatars from a single image. This is achieved by leveraging multi-view generation, 3D Gaussian lifting, and pose-aware UV-space mapping of 3D Gaussians. Given an image, we first dream plausible multi-views using a video diffusion model, capturing rich geometric and appearance details. These views are then lifted into unstructured 3D Gaussians. To enable animation, we propose a transformer-based enco…

Enhanced Absorption in Thin-Film Silicon Solar Cells Using a Broadband Plasmonic Nanostructure
Partha Mondal, Omar Alkhazragi, Hakan Bagci
https://arxiv.org/abs/2506.16118

Enhanced Absorption in Thin-Film Silicon Solar Cells Using a Broadband Plasmonic Nanostructure
The design and fabrication of a metal-dielectric-metal absorber that achieves strong absorption from the ultraviolet (UV) to the near-infrared (near-IR) spectrum are presented. The proposed nanostructure consists of a periodic titanium (Ti) array as the top layer, a thin silicon dioxide (SiO2) spacer, and a continuous aluminum (Al) layer serving as the back reflector. Comprehensive optimization of structural parameters results in an average absorptance of 96% in the 280-1000 nm wavelength range…

Intracluster ion-molecule reaction in quinoline and isoquinoline dimers under the influence of diverse ionizing radiations
S. Muthuamirthambal, B. Panja, S. Arun, J. Chiarinelli, K. Ramanathan, L. Avaldi, P. Bolognesi, R. Richter, J. Rejila, C. P. Safvan, R. Sreeja, M. Theertha, M. V. Vinitha, A. Vishnumaya, U. Kadhane
https://a…

Intracluster ion-molecule reaction in quinoline and isoquinoline dimers under the influence of diverse ionizing radiations
This work demonstrates the tendency of two model PANH isomers to dimerize under pure ambient evaporative conditions and then undergo complex intracluster ion-molecule reactions to produce rich chemistry. Despite the population of such dimers at room temperature is found to be relatively low, they are found to produce observable effects in typical stellar radiation conditions. It is also demonstrated that various types of energetic radiation (UV radiation at 266 nm, synchrotron VUV radiation and…

The subcritical finite-volume massive sine-Gordon model
Jaka Pelai\v{c}
https://arxiv.org/abs/2508.13778 https://arxiv.org/pdf/2508.13778

The subcritical finite-volume massive sine-Gordon model
We present a construction of the finite-volume massive sine-Gordon model in the UV subcritical regime using a renormalization group method. The resulting measure has Gaussian tails, respects toroidal symmetries and is reflection-positive.

Improving the atomic modelling for solar UV radiative transfer calculations
R. P. Dufresne, G. Del Zanna, C. M. J. Osborne
https://arxiv.org/abs/2508.06422 https://

Improving the atomic modelling for solar UV radiative transfer calculations
Radiative transfer calculations have been produced over the years for many lines and continua in the UV wavelength range of solar and cool stellar atmospheres for a variety of conditions. Despite significant improvements in computing power and availability of atomic data over time, atomic models are often still limited in size and rely on approximations for data. There have also been inconsistencies in the way photo-ionisation and radiative recombination have been treated. Here, we incorporate …

TeV-scale scalar leptoquarks motivated by B anomalies improve Yukawa unification in SO(10) GUT
Xiyuan Gao, Ulrich Nierste
https://arxiv.org/abs/2508.11745 https://

TeV-scale scalar leptoquarks motivated by B anomalies improve Yukawa unification in SO(10) GUT
It is common practice to explain deviations between data and Standard-Model predictions by postulating new particles at the TeV scale ad-hoc. This approach becomes much more convincing, if one successfully embeds the postulated particles into a UV completion which addresses other conceptual or phenomenological shortcomings of the SM. We present a study of an SO(10) grand unified theory which contains scalar leptoquark fields employed to explain the ``flavour anomalies'' in $b\rightarrow s$ and …

Backbone colouring of chordal graphs
J\'ulio Ara\'ujo, Nicolas Nisse, Lucas Picasarri-Arrieta
https://arxiv.org/abs/2508.02980 https://arxiv.org/pd…

Backbone colouring of chordal graphs
A proper $k$-colouring of a graph $G=(V,E)$ is a function $c: V(G)\to \{1,\ldots,k\}$ such that $c(u)\neq c(v)$ for every edge $uv\in E(G)$. The chromatic number $χ(G)$ is the minimum $k$ such that there exists a proper $k$-colouring of $G$. Given a spanning subgraph $H$ of $G$, a $q$-backbone $k$-colouring of $(G,H)$ is a proper $k$-colouring $c$ of $G$ such that $\lvert c(u)-c(v)\rvert \ge q$ for every edge $uv\in E(H)$. The $q$-backbone chromatic number ${\rm BBC}_q(G,H)$ is the smallest $k…

Low D/H ratio for benzonitrile in TMC-1: Implication for the origin of polycyclic aromatic hydrocarbons in cold dark clouds
A. L. Steber, J. Janeiro, C. Cabezas, M. Agundez, M. Pereira-Santaella, C. Perez, D. Perez, D. Heras, A. Lesarri, I. Garcia-Bernete, J. R. Goicoechea, J. Cernicharo
https://arxiv.org/abs/2507.16552

Low D/H ratio for benzonitrile in TMC-1: Implication for the origin of polycyclic aromatic hydrocarbons in cold dark clouds
Radioastronomical observations have recently discovered PAHs of moderate size (up to 24 carbon atoms) in cold dark clouds, although it is currently unknown whether they are formed in situ through a bottom-up mechanism or from larger PAHs (20-100 carbon atoms) inherited from a previous diffuse stage in a top-down scenario. Infrared observations have recently shown that large PAHs present in UV-illuminated regions are strongly enriched in deuterium. In order to shed light on the origin of PAHs in…

Adjacent vertex distinguishing total coloring of 3-degenerate graphs
Diptimaya Behera, Mathew C. Francis, Sreejith K. Pallathumadam
https://arxiv.org/abs/2508.03549 https://

Adjacent vertex distinguishing total coloring of 3-degenerate graphs
A total coloring of a simple undirected graph $G$ is an assignment of colors to its vertices and edges such that the colors given to the vertices form a proper vertex coloring, the colors given to the edges form a proper edge coloring, and the color of every edge is different from that of its two endpoints. That is, $ϕ:V(G)\cup E(G)\rightarrow\mathbb{N}$ is a total coloring of $G$ if $ϕ(u)\neqϕ(v)$ and $ϕ(uv)\neqϕ(u)$ for all $uv\in E(G)$, and $ϕ(uv)\neqϕ(uw)$ for any $u \in V(G)$ and di…

Soon to be a Marvel ™️ super-villain 😉
#radiation #ultraviolet #UV_C #lichen

UV-C Light Kills Nearly Everything - Except This Unusual Organism - Slashdot
"Earth's ozone layer blocks the Sun's shortest wave radiation, called UV-C, which is so damaging to cells in high doses that it's a go-to sterilizer in hospitals," writes Slashdot reader sciencehabit. "UV-C is such a killer, in fact, that scientists have questioned whether life can survive on world...

Exploring Spatially-Resolved Metallicities, Dynamics and Outflows in Low-Mass Galaxies at $z \sim 7.6$
L. R. Ivey, J. Scholtz, A. L. Danhaive, S. Koudmani, G. C. Jones, R. Maiolino, M. Curti, F. D'Eugenio, S. Tacchella, W. M. Baker, S. Arribas, S. Charlot, D. Eisenstein, Z. Ji, N. Laporte, D. Pusk\'as, B. Robertson, D. Sijacki, C. Witten
http…

Exploring Spatially-Resolved Metallicities, Dynamics and Outflows in Low-Mass Galaxies at $z \sim 7.6$
A majority of JWST/NIRSpec/IFU studies at high redshifts to date have focused on UV-bright or massive objects, while our understanding of low-mass galaxies at early cosmic times remains limited. In this work, we present NIRSpec/IFS high-resolution observations of two low-mass ($M_* < 10^9 \ M_\odot$), low-metallicity ($[12 + \log(\text{O/H})] < 8$) galaxies at $z \sim 7.66$ with evidence of hosting AGN. Using spatially-resolved maps of rest-frame optical emission lines, we find flat metallicity…

Using Faded Changing-Look Quasars to Unveil the Spectral Energy Distribution Evolution of Low-Luminosity Active Galactic Nuclei
Olivier Gilbert, John J. Ruan, Laura Duffy, Michael Eracleous, Scott F. Anderson, Paul J. Green, Daryl Haggard, Richard M. Plotkin, Jessie C. Runnoe, Malgorzata Sobolewska
https://arxiv.org/abs/2508.01933

Using Faded Changing-Look Quasars to Unveil the Spectral Energy Distribution Evolution of Low-Luminosity Active Galactic Nuclei
The structure of accretion flows in low-luminosity active galactic nuclei (AGN) at low Eddington ratios (~10^-2 to 10^-3) are poorly-understood, and can be probed using the spectral energy distributions (SEDs) of faded changing-look (CL) quasars. Previous results using single-epoch X-ray and rest-frame UV observations of samples of faded CL quasars suggest that their SED properties at low Eddington ratios display similarities to X-ray binaries fading from outburst. However, more robust tests de…

Consistent gas-phase C/O abundances from UV and optical emission lines: a robust scale for chemical evolution across cosmic time
Paige M. Kelly, Tucker Jones, Yuguang Chen, Ryan L. Sanders, Danielle A. Berg, Peter Senchyna, Fabio Bresolin, Daniel P. Stark
https://arxiv.org/abs/2508.03954

Consistent gas-phase C/O abundances from UV and optical emission lines: a robust scale for chemical evolution across cosmic time
The carbon to oxygen (C/O) abundance ratio is a valuable tracer of star formation history, as C and O enrichment occurs on different timescales. However, measurements based on ultraviolet (UV) collisionally excited lines and those based on optical recombination lines may be subject to biases from the abundance discrepancy factor (ADF), which is well established for oxygen but uncertain for carbon. We present precise UV-based measurements of gas-phase C$^{2+}$/O$^{2+}$ ionic abundance in four H …

BASS LIII: The Eddington Ratio as the Primary Regulator of the Fraction of X-ray Emission in Active Galactic Nuclei
Kriti Kamal Gupta, Claudio Ricci, Alessia Tortosa, Matthew J. Temple, Michael J. Koss, Benny Trakhtenbrot, Franz E. Bauer, Ezequiel Treister, Richard Mushotzky, Elias Kammoun, Iossif Papadakis, Kyuseok Oh, Alejandra Rojas, Chin-Shin Chang, Yaherlyn Diaz, Arghajit Jana, Darshan Kakkad, Ignacio del Moral-Castro, Alessandro Peca, Meredith C. Powell, Daniel Stern, C. Megan Ur…

BASS LIII: The Eddington Ratio as the Primary Regulator of the Fraction of X-ray Emission in Active Galactic Nuclei
Active galactic nuclei (AGN) emit radiation via accretion across the entire energy spectrum. While the standard disk and corona model can somewhat describe this emission, it fails to predict specific features such as the soft X-ray excess, the short-term optical/UV variability, and the observed UV/X-ray correlation in AGN. In this context, the fraction of AGN emission in different bands (i.e., bolometric corrections) can be useful to better understand the accretion physics of AGN. Past studies …

Structural evolution of quiescent galaxies at intermediate redshift at UV and red rest-frame wavelengths
Michele Pizzardo, Ivana Damjanov, Jubee Sohn, Margaret J. Geller
https://arxiv.org/abs/2507.10675

Structural evolution of quiescent galaxies at intermediate redshift at UV and red rest-frame wavelengths
We model the wavelength dependence of structural parameters for a mass-limited sample ($M_\star>10^{10}M_\odot$) of $\sim27,000$ quiescent galaxies with $0.2 < z < 0.6$ using $grizy$ photometry from Subaru/Hyper Suprime-Cam and dense spectroscopy from the HectoMAP survey. Based on Sérsic profile fits in all five bands, we estimate the circularized half-light radius $R_{e,c}$ and Sérsic index $n$ in two rest-frames: UV (3500 Å) and red (7000 Å). Combined with $M_\star$, $z$, and D$_n4000$, $…

Stochastic star formation activity of galaxies within the first billion years probed by JWST
C. Carvajal-Bohorquez, L. Ciesla, N. Laporte, M. Boquien, V. Buat, O. Ilbert, G. Aufort, M. Shuntov, C. Witten, P. A. Oesch, A. Covelo-Paz
https://arxiv.org/abs/2507.13160

Stochastic star formation activity of galaxies within the first billion years probed by JWST
JWST highlighted an excess of UV-bright galaxies at z>10, with a derived UVLF that exhibits a softer evolution than expected. In this work, we aim at characterizing the burstiness level of high-redshift galaxy SFHs and its evolution. We implement a stochastic SFH module in CIGALE using power spectrum densities, to estimate the burstiness level of star formation in galaxies at 66 galaxies, while smoother a…

Quantum Aspects of Natural Top Quark Condensation
Christopher T. Hill
https://arxiv.org/abs/2507.21243 https://arxiv.org/pdf/2507.21243

Quantum Aspects of Natural Top Quark Condensation
In top quark condensation the Brout-Englert-Higgs (BEH) boson is a $\bar{t}t$ bound state. With a UV completion of a single coloron exchange interaction, a recent semiclassical treatment gave a novel theory of the BEH boson as an extended object with composite scale $M_0\sim 6$ TeV. Presently we obtain the semiclassical theory as an effective action, using the source/Legendre transformation techniques of Jackiw, \etal, and fermion loop effects in the large-$N_c$ limit by deploying an auxiliary …

Physical properties of galaxies and the UV Luminosity Function from $z\sim6$ to $z\sim14$ in COSMOS-Web
Maximilien Franco, Caitlin M. Casey, Hollis B. Akins, Olivier Ilbert, Marko Shuntov, Steven L. Finkelstein, Louise Paquereau, Andreas L. Faisst, Anton M. Koekemoer, Michaela Hirschmann, Sebastiano Cantarella, Nicole E. Drakos, Stephen M. Wilkins, Henry Joy McCracken, Jeyhan S. Kartaltepe, Claudia Maraston, Fatemeh Abedini, Mark J. Achenbach, Rafael C. Arango-Toro, Fabrizio Gentile, G…

Physical properties of galaxies and the UV Luminosity Function from $z\sim6$ to $z\sim14$ in COSMOS-Web
We present measurements of the rest-frame ultraviolet luminosity function (UVLF) in three redshift bins over $z\sim5.5$-14 from the JWST COSMOS-Web survey. Our samples, selected using the dropout technique in the HST/ACS F814W, JWST/NIRCam F115W, and F150W filters, contain a total of 3099 galaxies spanning a wide luminosity range from faint ($M_{\rm UV}\sim-19$ mag) to bright ($M_{\rm UV}\sim-22.5$ mag). The galaxies are undergoing rapid star formation, with blue stellar populations. Surprising…

Nature or Nurture: LMC-like Dust in the Solar Metallicity Galaxy M31
Geoffrey C. Clayton, Petia Yanchulova Merica-Jones, Karl D. Gordon, Marjorie Decleir, Claire E. Murray, Ralph Bohlin, Luciana Bianchi, Philip Massey, Michael J. Wolff
https://arxiv.org/abs/2507.08612

Nature or Nurture: LMC-like Dust in the Solar Metallicity Galaxy M31
Using the {\it Hubble Space Telescope}/Space Telescope Imaging Spectrograph, ultraviolet (UV) extinction curves have been measured in M31 along thirteen new sightlines, increasing the M31 sample to seventeen. This sample covers a wide area of M31 having galactocentric distances of 5 to 16 kpc, enabling the analysis of UV extinction curve variations over a large region of an external galaxy similar to the Milky Way with global galactic characteristics such as metallicity for the first time. No c…

Clumpiness of galaxies revealed in the near-infrared with COSMOS-Web
Wilfried Mercier, Boris Sindhu Kalita, Marko Shuntov, Rafael C. Arango-Toro, Olivier Ilbert, Laurence Tresse, Yohan Dubois, Clotilde Laigle, Hossein Hatamnia, Nicolas McMahon, Andreas Faisst, Isa Cox, Maxime Trebitsch, Leo Michel-Dansac, Si-Yue Yu, Michaela Hirschmann, Marc Huertas-Company, Arianna Long, Anton Koekemoer, Gr\'egoire Aufort, Joseph Lewis, Ghassem Gozaliasl, R. Michael Rich, Jason Rhodes, Henry Joy M…

Clumpiness of galaxies revealed in the near-infrared with COSMOS-Web
Clumps in the rest-frame UV emission of galaxies have been observed for decades. Since the launch of the James Webb Space Telescope (JWST), a large population is detected in the rest-frame near-infrared (NIR), raising questions about their formation mechanism. We investigate the presence and properties of NIR over-densities (hereafter substructures) in star-forming and quiescent galaxies at 1 < z < 4 to understand their link to the evolution of their host galaxy. We identify substructures in JW…

Exploring Cosmic Dawn with PANORAMIC I: The Bright End of the UVLF at $z\sim9 -17$
Andrea Weibel, Pascal A. Oesch, Christina C. Williams, Christian Kragh Jespersen, Marko Shuntov, Katherine E. Whitaker, Hakim Atek, Rachel Bezanson, Gabriel Brammer, Iryna Chemerynska, Aidan P. Cloonan, Pratika Dayal, Lukas J. Furtak, Anne Hutter, Zhiyuan Ji, Michael V. Maseda, Mengyuan Xiao
…

Exploring Cosmic Dawn with PANORAMIC I: The Bright End of the UVLF at $z\sim9 -17$
In its first two years of operation, the James Webb Space Telescope has enabled the discovery of a surprising number of UV-bright galaxies at $z\sim10-14$. Their number density is still relatively uncertain, due to cosmic variance effects, and the limited survey area with deep imaging. Here, we combine pure parallel imaging from the PANORAMIC survey with data from legacy fields to constrain the bright end (M$_{\rm UV}<-18.5$) of the UV luminosity function (UVLF) over $0.28\,$deg$^2$ of NIRCam i…

MAGAZ3NE: Far-IR and Radio Insights into the Nature and Properties of Ultramassive Galaxies at $z\gtrsim3$
Wenjun Chang, Gillian Wilson, Ben Forrest, Ian McConachie, Tracy Webb, Allison G. Noble, Adam Muzzin, Michael C. Cooper, Danilo Marchesini, Gabriela Canalizo, A. J. Battisti, Aur\'elien Le Bail, Percy L. Gomez, Stephanie M. Urbano Stawinski, Marie E. Wisz

MAGAZ3NE: Far-IR and Radio Insights into the Nature and Properties of Ultramassive Galaxies at $z\gtrsim3$
Deep and wide-field near-infrared (NIR) surveys have recently discovered and confirmed ultramassive galaxies (UMGs; $\log (M_{\star}/M_{\odot})>11$) spectroscopically at high redshift. However, most are characterized using only ultraviolet (UV)-to-NIR photometry, offering limited insight into obscured star formation and active galactic nucleus (AGN) activity. In this work, we add ten far-infrared (FIR)-to-radio passbands to the existing UV-to-NIR catalogs for two spectroscopically confirmed UMG…

Strength in Numbers: Red Galaxies Bolster the Cosmic Star Formation Rate Density at z > 3
L. Barrufet, J. S. Dunlop, R. Begley, S. Flury, D. J. McLeod, K. Arellano-Cordova, A. Carnall, F. Cullen, C. T. Donnan, F. Liu, R. McLure, D. Scholte, T. M. Stanton, R. Cochrane, C. Conselice, R. Ellis, P. G. P\'erez-Gonz\'alez, R. Gottumukkala, N. A. Grogin, G. D. Illingworth, A. M. Koekemoer, D. Magee, M. Michalowski

Strength in Numbers: Red Galaxies Bolster the Cosmic Star Formation Rate Density at z > 3
A comprehensive account of the cosmic star-formation history demands an accurate census of dust-enshrouded star formation over cosmic time. We provide strong new constraints from a large sample of 777 red galaxies, selected based on their dust-reddened, rest-frame UV-optical emission. This sample of 777 galaxies spans $1 < z < 8$ and is selected from PRIMER JWST NIRCam and HST COSMOS optical data, ensuring robust colour criteria. The SEDs indicate that these dust-reddened galaxies are star-form…

The Discovery of Little Red Dots in the Local Universe: Signatures of Cool Gas Envelopes
Xiaojing Lin, Xiaohui Fan, Zheng Cai, Fuyan Bian, Hanpu Liu, Fengwu Sun, Yilun Ma, Jenny E. Greene, Michael A. Strauss, Richard Green, Jianwei Lyu, Jaclyn B. Champagne, Andy D. Goulding, Kohei Inayoshi, Xiangyu Jin, Gene C. K. Leung, Mingyu Li, Yichen Liu, Junjie Mao, Maria Anne Pudoka, Wei Leong Tee, Ben Wang, Feige Wang, Yunjing Wu, Jinyi Yang, Haowen Zhang, Yongda Zhu

The Discovery of Little Red Dots in the Local Universe: Signatures of Cool Gas Envelopes
JWST observations have revealed a population of high-redshift "little red dots" (LRDs) that challenge conventional AGN models. We report the discovery of three local LRDs at $z = 0.1-0.2$, initially selected from the SDSS database, with follow-up optical/near-IR spectroscopy and photometry. They exhibit properties fully consistent with those of high-redshift LRDs, including broad hydrogen and helium emission lines, compact morphologies, V-shaped UV-optical SED, declining near-IR continua, and n…

The ALMA REBELS survey: [OIII]$_{88\mu \text{m}}$ line scans of UV-bright $z \gtrsim 7.6$ galaxies
I. F. van Leeuwen, R. J. Bouwens, J. A. Hodge, P. P. van der Werf, H. S. B. Algera, S. Schouws, M. Aravena, R. A. A. Bowler, P. Dayal, A. Ferrara, R. Fisher, Y. Fudamoto, C. Gulis, T. Herard-Demanche, H. Inami, I. de Looze, A. Pallottini, R. Smit, L. Sommovigo, M. Stefanon

The ALMA REBELS survey: [OIII]$_{88μ\text{m}}$ line scans of UV-bright $z \gtrsim 7.6$ galaxies
We present the [OIII]$_{88μ\text{m}}$ spectral scan results from the ALMA Large Program REBELS (Reionization Era Bright Emission Line Survey). The generally high luminosity of [OIII]$_{88μ\text{m}}$ and ALMA's Band 7 efficiency motivated its use for line scans of REBELS targets at $z>8$. Spectral scans of four sources covered 326.4-373.0 GHz ($z=8.10$-9.39), reaching [OIII]$_{88μ\text{m}}$ luminosities of $\mathrm{\sim7.6\times10^8\ L_{\odot}}$ ($5σ$) for a FWHM of 400 km s$^{-1}$. No credi…

Spatially resolved H$\alpha$ emission in B14-65666: compact starbursts, ionizing efficiency and gas kinematics in an advanced merger at the Epoch of Reionization
C. Prieto-Jim\'enez, J. \'Alvarez-M\'arquez, L. Colina, A. Crespo G\'omez, A. Bik, G. \"Ostlin, A. Alonso-Herrero, L. Boogaard, K. I. Caputi, L. Costantin, A. Eckart, M. Garc\'ia-Mar\'in, S. Gillman, J. Hjorth, E. Iani, I. Jermann, A. Labiano, D. Langeroodi, J. Melinder, T. Moutard, F. Pei{\ss}ker,…

Spatially resolved H$α$ emission in B14-65666: compact starbursts, ionizing efficiency and gas kinematics in an advanced merger at the Epoch of Reionization
We present MIRI/JWST medium resolution spectroscopy (MRS) and imaging (MIRIM) of B14-65666, a Lyman-break and interacting galaxy at redshift $z$=7.15. We detect the H$α$ line emission in this system, revealing a spatially-resolved structure of the H$α$ emitting gas, which consists of two distinct galaxies, E and W, at a projected distance of 0.4". Galaxy E is very compact in the rest-frame UV, while W galaxy is more extended, showing a clumpy structure reminiscent of a tidal tail. The total H…

CECILIA: Ultra-Deep Rest-Optical Spectra of Faint Galaxies at Cosmic Noon
Menelaos Raptis, Ryan F. Trainor, Allison L. Strom, Gwen C. Rudie, Noah S. J. Rogers, Charles C. Steidel, Michael V. Maseda, Caroline von Raesfeld, Nathalie A. Korhonen Cuestas
https://arxiv.org/abs/2507.22237

CECILIA: Ultra-Deep Rest-Optical Spectra of Faint Galaxies at Cosmic Noon
Intrinsically faint galaxies at $z\sim2-3$ offer critical insights into early galaxy formation, tracing low-metallicity, low-mass systems during Cosmic Noon and serving as analogs to reionization-era galaxies. We present ultra-deep JWST/NIRSpec spectroscopy of nine low-luminosity galaxies ($-17 \lesssim M_{\rm UV} \lesssim -20$, $M_\star \lesssim 10^9\,M_\odot$) at $z\sim2.5$ from the CECILIA program, with $\sim$29.5 hr in G235M/F170LP and 1 hr in G395M/F290LP. Our sample includes four LAEs, th…

The Identification of Two JWST/NIRCam-Dark Starburst Galaxies at $z=6.6$ with ALMA
Fengwu Sun, Jinyi Yang, Feige Wang, Daniel J. Eisenstein, Roberto Decarli, Xiaohui Fan, George H. Rieke, Eduardo Ba\~nados, Sarah E. I. Bosman, Zheng Cai, Jaclyn B. Champagne, Luis Colina, Francesco D'Eugenio, Yoshinobu Fudamoto, Mingyu Li, Xiaojing Lin, Weizhe Liu, Jianwei Lyu, Chiara Mazzucchelli, Xiangyu Jin, Hyunsung D. Jun, Yunjing Wu, Huanian Zhang

The Identification of Two JWST/NIRCam-Dark Starburst Galaxies at $z=6.6$ with ALMA
We analyze two dusty star-forming galaxies at $z=6.6$. These galaxies are selected from the ASPIRE survey, a JWST Cycle-1 medium and ALMA Cycle-9 large program targeting 25 quasars and their environments at $z\simeq6.5 - 6.8$. These galaxies are identified as companions to UV-luminous quasars and robustly detected in ALMA continuum and [C II] emission, yet they are extraordinarily faint at the NIRCam wavelengths (down to $>28.0$ AB mag in the F356W band). They are more obscured than galaxies li…

Interpreting nebular emission lines in the high-redshift Universe
Aswin P. Vijayan, Robert M. Yates, Christopher C. Lovell, William J. Roper, Stephen M. Wilkins, Hiddo S. B. Algera, Shihong Liao, Paurush Punyasheel, Lucie E. Rowland, Louise T. C. Seeyave
https://arxiv.org/abs/2507.20190

Interpreting nebular emission lines in the high-redshift Universe
One of the most remarkable outcomes from JWST has been the exquisite UV-optical spectroscopic data for galaxies in the high-redshift Universe ($z \geq 5$), enabling the use of various nebular emission lines to infer conditions of the interstellar medium. In this work, we evaluate the reliability of these diagnostics, specifically those used to recover the star formation rate (SFR), the ionising photon production efficiency, and the gas-phase oxygen abundance. We use forward-modelled galaxy spec…

PDRs4All XIV: CH radical and $H_3^ $ molecular ion in the irradiated protoplanetary disk d203-506
I. Schroetter, O. Bern\'e, J. R. Goicoechea, J. H. Black, O. Roncero, F. Alarcon, P. Amiot, O. Asvany, C. Boersma, S. Br\"unken, J. Cami, L. Coudert, E. Dartois, A. Fuente, B. Gans, A. Gusdorf, U. Jacovella, M. A. Martin Drumel, T. Onaka, E. Peeters, E. Roueff, A. G. G. M. Tielens, M. Zannese

PDRs4All XIV: CH radical and $H_3^+$ molecular ion in the irradiated protoplanetary disk d203-506
Most protoplanetary disks experience a phase in which they are subjected to strong ultraviolet radiation from nearby massive stars. This UV radiation can substantially alter their chemistry by producing numerous radicals and molecular ions. In this Letter we present detailed analysis of the JWST-NIRSpec spectrum of the d203-506 obtained as part of the PDRs4All Early Release Science program. Using state-of-the-art spectroscopic data, we searched for species using a multi-molecule fitting tool, P…

RIOJA. Merger-induced Clumps in a Galaxy at Redshift 6.81 Revealed by JWST
Ken Mawatari, Luca Costantin, Mitsutaka Usui, Takuya Hashimoto, Javier \'Alvarez-M\'arquez, Yuma Sugahara, Luis Colina, Akio K. Inoue, Wataru Osone, Santiago Arribas, Rui Marques-Chaves, Yurina Nakazato, Masato Hagimoto, Takeshi Hashigaya, Daniel Ceverino, Naoki Yoshida, Tom J. L. C. Bakx, Yoshinobu Fudamoto, Alejandro Crespo G\'omez, Hiroshi Matsuo, Miguel Pereira-Santaella, Carmen Blanco-Prieto, Yi…

RIOJA. Merger-induced Clumps in a Galaxy at Redshift 6.81 Revealed by JWST
Spatially resolved multi-wavelength analysis is essential to study galaxy formation and evolution. A UV-bright galaxy COS-2987030247 at $z = 6.81$ is one of the Rosetta Stones in the epoch of reionization for which JWST NIRSpec Integral Field Spectroscopy, NIRCam imaging, and ALMA data are available thanks to the RIOJA program. We identified the rest-frame optical emission lines from the ionized hydrogen, oxygen, and neon gas. The [OIII] 5008Å line emission and the NIRCam images show a complex…