Galaxy formation and evolution

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Precise dynamical masses of new directly imaged companions from combining relative astrometry, radial velocities, and HIPPARCOS-Gaia eDR3 accelerations

Astronomy & Astrophysics EDP Sciences 668 (2022) A140-A140

Authors:

EL Rickman, E Matthews, W Ceva, D Ségransan, GM Brandt, H Zhang, TD Brandt, T Forveille, J Hagelberg, S Udry

Abstract:

Aims. With an observing time span of more than 20 yr, the CORALIE radial-velocity survey is able to detect long-term trends in data corresponding to companions with masses and separations accessible to direct imaging. Combining exoplanet detection techniques, such as radial velocities from the CORALIE survey, astrometric accelerations from HIPPARCO
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A solar metallicity galaxy at $z >$ 7? Possible detection of the [N II] 122 $\mu$m and [O III] 52 $\mu$m lines

(2022)

Authors:

Meghana Killi, Darach Watson, Seiji Fujimoto, Hollis Akins, Kirsten Knudsen, Johan Richard, Yuichi Harikane, Dimitra Rigopoulou, Francesca Rizzo, Michele Ginolfi, Gergö Popping, Vasily Kokorev
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Translators of galaxy morphology indicators between observation and simulation

(2022)

Authors:

Jk Jang, Sukyoug K Yi, Yohan Dubois, Jinsu Rhee, Christophe Pichon, Taysun Kimm, Julien Devriendt, Marta Volonteri, Sugata Kaviraj, Sebastien Peirani, Sree Oh, Scott Croom
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PHANGS: constraining star formation time-scales using the spatial correlations of star clusters and giant molecular clouds

Monthly Notices of the Royal Astronomical Society 516:3 (2022) 4612-4626

Authors:

JA Turner, DA Dale, J Lilly, M Boquien, S Deger, JC Lee, BC Whitmore, GS Anand, SM Benincasa, F Bigiel, GA Blanc, M Chevance, E Emsellem, CM Faesi, SCO Glover, K Grasha, A Hughes, RS Klessen, K Kreckel, JM Diederik Kruijssen, AK Leroy, HA Pan, E Rosolowsky, A Schruba, TG Williams

Abstract:

In the hierarchical view of star formation, giant molecular clouds (GMCs) undergo fragmentation to form small-scale structures made up of stars and star clusters. Here we study the connection between young star clusters and cold gas across a range of extragalactic environments by combining the high resolution (1″) PHANGS-ALMA catalogue of GMCs with the star cluster catalogues from PHANGS-HST. The star clusters are spatially matched with the GMCs across a sample of 11 nearby star-forming galaxies with a range of galactic environments (centres, bars, spiral arms, etc.). We find that after 4 - 6 Myr the star clusters are no longer associated with any gas clouds. Additionally, we measure the autocorrelation of the star clusters and GMCs as well as their cross-correlation to quantify the fractal nature of hierarchical star formation. Young (≤10 Myr) star clusters are more strongly autocorrelated on kpc and smaller spatial scales than the >, 10 Myr stellar populations, indicating that the hierarchical structure dissolves over time.
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A New Task: Deriving Semantic Class Targets for the Physical Sciences

ArXiv 2210.1476 (2022)

Authors:

Micah Bowles, Hongming Tang, Eleni Vardoulaki, Emma L Alexander, Yan Luo, Lawrence Rudnick, Mike Walmsley, Fiona Porter, Anna MM Scaife, Inigo Val Slijepcevic, Gary Segal
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