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EARLY-TYPE GALAXY SPIN EVOLUTION IN THE HORIZON-AGN SIMULATION
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2019.04.11
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EARLY-TYPE GALAXY SPIN EVOLUTION IN THE HORIZON-AGN SIMULATION


Authors : Hoseung Choi, Sukyoung K. Yi, Yohan Dubois, Taysun Kimm, Julien. E. G. Devriendt, and Christophe Pichon


Publication: Astrophysical Journal, 2018 April


Introduction (Kor) : Horizon-AGN 시뮬레이션을 활용한 타원은하 회전의 환경 영향에 대한 연구


Introduction (Eng) : The diversity in the ETG spin has drawn much attention for the last decade. We analyzed the Horizon-AGN simulation, a cosmological galaxy formation simulation of 100Mpc/h cube, to investigate the differences in the evolution of ETGs with different spin properties. We found that massive central ETGs form through numerous mergers and are preferentially very slowly rotating. However, group and cluster satellite ETGs, which are multiple times more numerous than the massive central ETGs, show slow rotation not because of mergers but because of environmental tidal interactions such as fly-bys or tidal force of the cluster potential. This differential evolutionary track may appear as distinct features in spin versus stellar mass plot, for example.


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