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Exoplanets across galactic stellar populations with PLATO: Estimating exoplanet yields around FGK stars for the thin disk, thick disk, and stellar halo
Dayal, P.; Boettner, C.; Viswanathan, A.
Context. The vast majority of exoplanet discoveries to date have occurred around stars in the solar neighbourhood, with chemical compositions comparable to that of the Sun. However, models suggest that planetary systems in different Galactic environments, with varying dynamical histories and chemical abundances, may exhibit distinct characteristic…
An investigation into Venusian atmospheric chemistry based on an open-access photochemistry-transport model at 0–112 km
Sheng, Zheng; Dai, Longkang; Shao, Wencheng
Atmospheric chemistry plays a crucial role in the evolution of climate habitability on Venus. It has been widely explored by chemistry-transport models, but some characteristics are still poorly interpreted. This study is devoted to developing an open-access chemistry-transport model spanning both the middle and lower atmospheres of Venus. It prov…
CLASSY. XI. Tracing Neutral Gas Properties Using UV Absorption Lines and 21 cm Observations
Martin, Crystal L.; McQuinn, Kristen B. W.; Skillman, Evan D. +15 more
Rest-frame far-ultraviolet (FUV) observations from JWST are revolutionizing our understanding of the high-z galaxies that drove reionization and the mechanisms by which they accomplished it. To fully interpret these observations, we must be able to diagnose how properties of the interstellar medium (ISM; e.g., column density, covering fraction, an…
Laboratory and Computational Studies of Interstellar Ices
Ioppolo, S.; Linnartz, H.; Cuppen, Herma M.
Ice mantles play a crucial role in shaping the astrochemical inventory of molecules during star and planet formation. Small-scale molecular processes have a profound impact on large-scale astronomical evolution. The areas of solid-state laboratory astrophysics and computational chemistry involve the study of these processes. We review laboratory e…
Velocity Dispersion of the Open Cluster NGC 2571 by Radial Velocities and Proper Motions
Carraro, Giovanni; Seleznev, Anton F.; Kulesh, Maxim V. +3 more
We use a kernel density estimator method to evaluate the stellar velocity dispersion in the open cluster NGC 2571. We derive the 3D velocity dispersion using both proper motions as extracted from Gaia Data Release 3 and single-epoch radial velocities as obtained with the instrument FLAMES at ESO's Very Large Telescope. The mean-square velocity alo…
Correction to: TOI-2447 b / NGTS-29 b: a 69-day Saturn around a Solar analogue
Trifonov, Trifon; Henning, Thomas; Ramsay, Gavin +63 more
Discovering transiting exoplanets with relatively long orbital periods ($>$10 days) is crucial to facilitate the study of cool exoplanet atmospheres ($T_{\rm eq} < 700 K$) and to understand exoplanet formation and inward migration further out than typical transiting exoplanets. In order to discover these longer period transiting exoplanets, …
What causes the ultraviolet extinction bump at the cosmic dawn?
Li, Aigen; Yang, X. J.; Li, Qi
The enigmatic ultraviolet (UV) extinction bump at 2175
The GAPS Programme at TNG: LXI. Atmospheric parameters and elemental abundances of TESS young exoplanet host stars
Baratella, M.; Scandariato, G.; Sozzetti, A. +26 more
Context. The study of exoplanets at different evolutionary stages can shed light on their formation, migration, and evolution. The determination of exoplanet properties depends on the properties of their host stars. It is therefore important to characterise the host stars for accurate knowledge on their planets. Aims. Our final goal is to derive, …
Molecular cloud matching in CO and dust in M33: I. High-resolution hydrogen column density maps from Herschel
Bigiel, Frank; Ossenkopf-Okada, Volker; Riechers, Dominik +7 more
This study is aimed to contribute to a more comprehensive understanding of the molecular hydrogen distribution in the galaxy M33 by introducing novel methods for generating high angular resolution (18.2″, equivalent to 75 pc for a distance of 847 kpc) column density maps of molecular hydrogen (NH2). M33 is a local group galax…
Stacking and Analyzing MOSDEF Galaxies by Spectral Types: Implications for Dust Geometry and Galaxy Evolution
Siana, Brian; Shapley, Alice E.; Reddy, Naveen A. +12 more
We examine star formation and dust properties for a sample of 660 galaxies at 1.37 ≤ z ≤ 2.61 in the MOSDEF survey by dividing them into groups with similarly shaped spectral energy distributions (SEDs). For each group, we combine the galaxy photometry into a finely sampled composite SED, and stack their spectra. This method enables the study of m…