Tootfinder

Galaxy And Mass Assembly (GAMA): from filaments to voids, how extreme environment affects gas metallicity and SFR in galaxies
J. A. Molina-Calzada, M. A. Lara-L\'opez, J. Gallego, A. M. Hopkins, Benne W. Holwerda, A. R. L\'opez-S\'anchez
https://arxiv.org/abs/2507.06781

Galaxy And Mass Assembly (GAMA): from filaments to voids, how extreme environment affects gas metallicity and SFR in galaxies
We analyse the stellar mass-metallicity (M-Z) and stellar mass-star formation rate (M-SFR) relations for star-forming galaxies classified by their environment and compare them with matched control samples of field galaxies. Using data from the Galaxy And Mass Assembly (GAMA) survey and the filament catalogue, which categorises galaxies into filaments, tendrils, and voids, we correct emission lines for dust extinction and select star-forming galaxies based on the BPT diagram. Metallicity and sta…

"‘A climate of unparalleled malevolence’: are we on our way to the sixth major mass extinction?"
#Climate #ClimateChange

‘A climate of unparalleled malevolence’: are we on our way to the sixth major mass extinction? https://www.theguardian.com/environment/2025/aug/19/a-climate-of-unparalleled-malevolence-are-we-on-our-way-…

I thought this #Guardian / #WaPo piece by some Peter Brennan might be worth a glance, though expecting only 60% stuff everyone knows (or should know), and 40% tedious irrelevant human interest guff. Which just proves that you can never set one's expectations low enough.
Well, I made it as …

A Comprehensive Analysis of X-ray Sources in Terzan 5 Using Chandra Observations
Gourav Kumawat, Craig O. Heinke, Jiaqi Zhao, Arash Bahramian, Haldan N. Cohn, Phyllis M. Lugger
https://arxiv.org/abs/2508.02526

A Comprehensive Analysis of X-ray Sources in Terzan 5 Using Chandra Observations
We analyze photometry, spectra, and variability of over 100 faint X-ray sources in the globular cluster Terzan 5, using 737 ks of Chandra data. X-ray colors and spectral fitting allow clear separation of foreground sources (with less extinction than the cluster), quiescent low-mass X-ray binaries (qLMXBs), and sources with harder spectra. We identify 22 candidate qLMXBs, over twice that found in any other cluster. This is consistent with Terzan 5's stellar interaction rate, the highest among Ga…

Sieging HELM's deep: PRIMA unveils the far-infrared properties of highly extincted low-mass galaxies
Laura Bisigello, Carlotta Gruppioni, Giulia Rodighiero, Giovanni Gandolfi, James M. S. Donnellan, Seb Oliver, Stephen M. Wilkins, L. Y. Aaron Yung
https://arxiv.org/abs/2509.01305

Sieging HELM's deep: PRIMA unveils the far-infrared properties of highly extincted low-mass galaxies
Although the majority of star-forming galaxies show a tight correlation between stellar mass and dust extinction, recent James Webb Space Telescope observations have revealed a peculiar population of Highly Extincted Low-Mass (HELM) galaxies, which could revolutionise our understanding of dust production mechanisms. To fully understand the dust content of these galaxies, which are a minority of the overall galaxy population, far-infrared observations over large areas are pivotal. In this paper,…

The ODYSSEUS Survey. Characterizing magnetospheric geometries and hotspot structures in T Tauri stars
Caeley V. Pittman, C. C. Espaillat, Connor E. Robinson, Thanawuth Thanathibodee, Sophia Lopez, Nuria Calvet, Zhaohuan Zhu, Frederick M. Walter, John Wendeborn, Carlo Felice Manara, Justyn Campbell-White, Rik A. Claes, Min Fang, Antonio Frasca, J. F. Gameiro, Manuele Gangi, Jesus Hern\'andez, \'Agnes K\'osp\'al, Karina Mauc\'o, James Muzerolle, Micha{\l} Siwak, {\L}u…

The ODYSSEUS Survey. Characterizing magnetospheric geometries and hotspot structures in T Tauri stars
Magnetospheric accretion is a key process that shapes the inner disks of T Tauri stars, controlling mass and angular momentum evolution. It produces strong ultraviolet and optical emission that irradiates the planet-forming environment. In this work, we characterize the magnetospheric geometries, accretion rates, extinction properties, and hotspot structures of 67 T Tauri stars in the largest and most consistent study of ultraviolet and optical accretion signatures to date. To do so, we apply a…

How Massive Star Clusters Form and Evolve: A Near-IR Survey of the W51 Complex
Aden Dawson, Adam Ginsburg, Carlos Roman-Zuniga
https://arxiv.org/abs/2507.23112 https://

How Massive Star Clusters Form and Evolve: A Near-IR Survey of the W51 Complex
We present near-infrared JHKs and narrow-band H2(1-0) photometric observations of the W51A region, obtained with GTC EMIR, aiming to characterize its young stellar population and provide mass estimates for individual cluster members and the proto-clusters. Our observations reveal over 3000 new sources, out of which 88 are located in the proto-clusters, W51 IRS2 and W51 Main. The average extinction (AV), measured from the J-H color, of sources is 19 AV in W51 IRS2 and 14 AV in W51 Main. We docum…

Many mass extinctions of Earth history were caused not by asteroids as they had expected, but by continent-spanning volcanic eruptions that injected catastrophic amounts of CO2 into the air and oceans.
Put enough CO2 into the system all at once, and push the life-sustaining carbon cycle far enough out of equilibrium, and it might escape into a sort of planetary failure mode, where processes intrinsic to the Earth itself take over, acting as positive feedback.
https://www.theguardian.com/environment/2025/aug/19/a-climate-of-unparalleled-malevolence-are-we-on-our-way-to-the-sixth-major-mass-extinction?CMP=Share_iOSApp_Other

Bar properties as a function of wavelength in Illustris TNG50: analysis of mock images
Gustavo F. Gon\c{c}alves, Rubens E. G. Machado, Kar\'in Men\'endez-Delmestre, Thiago Bueno-Dalpiaz
https://arxiv.org/abs/2506.19373

Bar properties as a function of wavelength in Illustris TNG50: analysis of mock images
Recent studies used Illustris TNG50 galaxies to study bar formation, evolution, and properties like length, strength, and pattern speed. In simulations, these are typically derived from particle positions and mass distribution, neglecting stellar light and extinction effects. However, observational studies indicate that bar appearance depends on wavelength. To test whether this dependence exists in TNG50 at $z \sim 0$, we analysed 50 strongly barred galaxies using mock images from SKIRT radiati…

A kinematic and structural study of young open clusters in the Milky Way Galaxy using Gaia DR3 catalogue
Harsha K. H., Annapurni Subramaniam, S. R. Dhanush, Hariharan D. S
https://arxiv.org/abs/2507.13069

A kinematic and structural study of young open clusters in the Milky Way Galaxy using Gaia DR3 catalogue
We aim to identify the cluster members, estimate cluster properties, study the dynamical state of the clusters as a function of mass, trace the existence of dynamical effects in massive stars, and check for spatial patterns of members in young clusters. We studied 14 young open clusters located within 1 kpc using the data from Gaia DR3 with the membership estimated using the GMM method. The cluster parameters such as age, distance, metallicity, and extinction were estimated by fitting PARSEC is…