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Galaxy Quenching at the High Redshift Frontier: A Fundamental Test of Cosmological Models in the Early Universe with JWST-CEERS
Maiolino, Roberto; Conselice, Christopher J.; Bluck, Asa F. L. +10 more
We present an analysis of the quenching of star formation in massive galaxies (M * > 109.5 M ⊙) within the first 0.5–3 Gyr of the Universe's history utilizing JWST-CEERS data. We utilize a combination of advanced statistical methods to accurately constrain the intrinsic dependence of quenching in a multidimensio…
Young Star Clusters Dominate the Production of Detached Black Hole–Star Binaries
Breivik, Katelyn; Rodriguez, Carl L.; Di Carlo, Ugo Niccolò +1 more
The recent discovery of two detached black hole–star (BH–star) binaries from Gaia's third data release has sparked interest in understanding the formation mechanisms of these systems. We investigate the formation of these systems by dynamical processes in young star clusters (SCs) and via isolated binary (IB) evolution, using a combination of dire…
Effect of Extinction on Quasar Luminosity Distances Determined from UV and X-Ray Flux Measurements
Zajaček, Michal; Czerny, Bożena; Khadka, Narayan +4 more
In Khadka et al., a sample of X-ray-detected reverberation-mapped quasars was presented and applied for the comparison of cosmological constraints inferred using two well-established relations in active galactic nuclei—the X-ray/UV luminosity (L X –L UV) relation and the broad-line region radius–luminosity (R–L) relation. L …
The APO-K2 Catalog. I. 7500 Red Giants with Fundamental Stellar Parameters from APOGEE DR17 Spectroscopy and K2-GAP Asteroseismology
Pinsonneault, Marc; Stassun, Keivan G.; García, Rafael A. +14 more
We present a catalog of fundamental stellar properties for ~7500 evolved stars, including stellar radii and masses, determined from the combination of spectroscopic observations from the Apache Point Observatory Galactic Evolution Experiment, part of the Sloan Digital Sky Survey IV, and asteroseismology from K2. The resulting APO-K2 catalog provid…
RR Lyrae from binary evolution: abundant, young, and metal-rich
Belokurov, Vasily; Bobrick, Alexey; Iorio, Giuliano +3 more
RR Lyrae are a well-known class of pulsating horizontal branch stars widely used as tracers of old, metal-poor stellar populations. However, mounting observational evidence shows that a significant fraction of these stars may be young and metal-rich. Here, through detailed binary stellar evolution modelling, we show that all such metal-rich RR Lyr…
Transmission Spectroscopy of the Habitable Zone Exoplanet LHS 1140 b with JWST/NIRISS
MacDonald, Ryan J.; Dang, Lisa; Cowan, Nicolas B. +20 more
LHS 1140 b is the second-closest temperate transiting planet to Earth with an equilibrium temperature low enough to support surface liquid water. At 1.730 ± 0.025 R ⊕, LHS 1140 b falls within the radius valley separating H2-rich mini-Neptunes from rocky super-Earths. Recent mass and radius revisions indicate a bulk density si…
Gaia DR3 data consistent with a short bar connected to a spiral arm
Steinmetz, M.; Khoperskov, S.; Minchev, I. +8 more
We use numerical simulations to model Gaia DR3 data with the aim of constraining the Milky Way (MW) bar and spiral structure parameters. We show that both the morphology and the velocity field in MW-like galactic disc models are strong functions of time, changing dramatically over a few tens of Myr. This suggests that by finding a good match to th…
Evidence for inflows and outflows in the nearby black hole transient Swift J1727.8−162
Armas Padilla, M.; Mata Sánchez, D.; Muñoz-Darias, T. +2 more
We present 20 epochs of optical spectroscopy obtained with the GTC-10.4m telescope across the bright discovery outburst of the black hole candidate Swift J1727.8−162. The spectra cover the main accretion states and are characterised by the presence of hydrogen and helium emission lines, commonly observed in these objects. They show complex profile…
THEMIS 2.0: A self-consistent model for dust extinction, emission, and polarisation
Miville-Deschênes, M. -A.; Ysard, N.; Guillet, V. +6 more
Context. Recent observational constraints in emission, extinction, and polarisation have at least partially invalidated most of the astronomical standard grain models for the diffuse interstellar medium. Moreover, laboratory measurements on interstellar silicate analogues have shown quite significant differences with the optical properties used in…
The ALMA-CRISTAL survey: Widespread dust-obscured star formation in typical star-forming galaxies at z = 4–6
Übler, Hannah; Ferrara, Andrea; Fisher, Deanne B. +29 more
We present the morphological parameters and global properties of dust-obscured star formation in typical star-forming galaxies at z = 4–6. Among 26 galaxies composed of 20 galaxies observed by the Cycle-8 ALMA Large Program, CRISTAL, and 6 galaxies from archival data, we individually detect rest-frame 158 µm dust continuum emission from 19 g…