Galaxy formation and evolution

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Molecular Gas Heating, Star Formation Rate Relations, and AGN Feedback in Infrared-Luminous Galaxy Mergers

Universe MDPI 9:1 (2022) 3

Authors:

Duncan Farrah, Andreas Efstathiou, Jose Afonso, David L Clements, Kevin Croker, Evanthia Hatziminaoglou, Maya Joyce, Vianney Lebouteiller, Aláine Lee, Carol Lonsdale, Chris Pearson, Sara Petty, Lura K Pitchford, Dimitra Rigopoulou, Aprajita Verma, Lingyu Wang
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Black Hole Binary Formation in AGN Discs: From Isolation to Merger

(2022)

Authors:

Connar Rowan, Tjarda Boekholt, Bence Kocsis, Zoltán Haiman
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Identification and properties of intense star-forming galaxies at redshifts z>10

(2022)

Authors:

BE Robertson, S Tacchella, BD Johnson, K Hainline, L Whitler, DJ Eisenstein, R Endsley, M Rieke, DP Stark, S Alberts, A Dressler, E Egami, R Hausen, G Rieke, I Shivaei, CC Williams, CNA Willmer, S Arribas, N Bonaventura, A Bunker, AJ Cameron, S Carniani, S Charlot, J Chevallard, M Curti, E Curtis-Lake, F D'Eugenio, P Jakobsen, TJ Looser, N Lützgendorf, R Maiolino, MV Maseda, T Rawle, H-W Rix, R Smit, H Übler, C Willott, J Witstok, S Baum, R Bhatawdekar, K Boyett, Z Chen, A de Graaff, M Florian, JM Helton, RE Hviding, Z Ji, N Kumari, J Lyu, E Nelson, L Sandles, A Saxena, KA Suess, F Sun, M Topping, IEB Wallace
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The evolution of the galaxy UV luminosity function at redshifts z ≃ 8 – 15 from deep JWST and ground-based near-infrared imaging

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 518:4 (2022) 6011-6040

Authors:

CT Donnan, DJ McLeod, JS Dunlop, RJ McLure, AC Carnall, R Begley, F Cullen, ML Hamadouche, RAA Bowler, D Magee, HJ McCracken, B Milvang-Jensen, A Moneti, T Targett
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Star formation history and transition epoch of cluster galaxies based on the Horizon-AGN simulation

Astrophysical Journal American Astronomical Society 941:1 (2022) 5

Authors:

Seyoung Jeon, Sukyoung K Yi, Yohan Dubois, Aeree Chung, Julien Devriendt, San Han, Ryan A Jackson, Taysun Kimm, Christophe Pichon, Jinsu Rhee

Abstract:

Cluster galaxies exhibit substantially lower star formation rates than field galaxies today, but it is conceivable that clusters were sites of more active star formation in the early universe. Herein, we present an interpretation of the star formation history (SFH) of group/cluster galaxies based on the large-scale cosmological hydrodynamic simulation, Horizon-AGN. We find that massive galaxies in general have small values of e-folding timescales of star formation decay (i.e., "mass quenching") regardless of their environment, while low-mass galaxies exhibit prominent environmental dependence. In massive host halos (i.e., clusters), the e-folding timescales of low-mass galaxies are further decreased if they reside in such halos for a longer period of time. This "environmental quenching" trend is consistent with the theoretical expectation from ram pressure stripping. Furthermore, we define a "transition epoch" as where cluster galaxies become less star-forming than field galaxies. The transition epoch of group/cluster galaxies varies according to their stellar and host-cluster halo masses. Low-mass galaxies in massive clusters show the earliest transition epoch of ∼7.6 Gyr ago in lookback time. However, this decreases to ∼5.2 Gyr for massive galaxies in low-mass clusters. Based on our findings, we can describe a cluster galaxy's SFH with regard to the cluster halo-to-stellar mass ratio.
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