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SUMMARY:Emergence and physical origin of environmental effect patterns in 
 galaxy groups
DTSTART:20260310T100000Z
DTEND:20260310T110000Z
DTSTAMP:20260515T043900Z
UID:indico-event-58@indico.iap.fr
DESCRIPTION:Speakers: Jinsu Rhee (IAP)\n\nThe role of environments in gala
 xy evolution has traditionally been studied at the two extremes: galaxy cl
 usters and the field. In particular\, red and dead galaxies are preferenti
 ally found in high-density regions. However\, a substantial fraction of ga
 laxies reside in intermediate-density environments\, namely galaxy groups\
 , highlighting the importance of groups in galaxy evolution. Despite this 
 significance\, the dominant population of satellite galaxies in groups is 
 low-mass and faint\, which has limited detailed investigations in both obs
 ervations and simulations. To address this\, we employ high-resolution cos
 mological zoom-in simulations to examine how satellite galaxies evolve in 
 low-virial-mass systems.  We find that satellite galaxies in groups exhib
 it distinct patterns of SF quenching and gas stripping compared to their c
 ounterparts in clusters. In clusters\, gas stripping is primarily driven b
 y strong ram pressure from the intracluster medium (ICM). In contrast\, gr
 oup satellite galaxies experience gas removal mainly through interactions 
 with neighboring galaxies\, gas clumps\, and galactic outflows. In additio
 n\, group satellites display complex SF quenching behaviors\, with quenchi
 ng occurring near group centers and rejuvenation in the outskirts. Unlike 
 the relatively simple delay-then-rapid quenching scenario often invoked fo
 r cluster galaxies\, satellite galaxies in groups follow a more diverse se
 t of gas-stripping and quenching pathways\, primarily driven by their weak
 er gravitational potentials and the milder environmental effects. These re
 sults point to the need for a more nuanced description of galaxy evolution
  across different host halo mass scales.\n\nhttps://indico.iap.fr/event/58
 /
LOCATION:Salle des séminaires (IAP)
URL:https://indico.iap.fr/event/58/
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