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SUMMARY:Quenching and ram pressure in simulated low-mass Local Group galax
 ies
DTSTART;VALUE=DATE-TIME:20230322T114400Z
DTEND;VALUE=DATE-TIME:20230322T114600Z
DTSTAMP;VALUE=DATE-TIME:20241114T092438Z
UID:indico-contribution-262@meetings.aip.de
DESCRIPTION:Speakers: Jenna Samuel (UT Austin)\nLow-mass or dwarf galaxies
  are particularly compelling laboratories for star formation quenching bec
 ause they are highly susceptible to quenching effects from both internal s
 tellar feedback and external environment. We explore the role of ram press
 ure in the environmental regulation of gas content and quenching of low-ma
 ss galaxies in zoom-in hydrodynamic simulations of Milky Way (MW) mass hos
 ts. The quiescent fraction of low-mass galaxies increases as their stellar
  mass decreases and as their distance to a MW-mass host decreases\, simila
 r to the Local Group. In addition\, the location of a satellite at quenchi
 ng (in a MW halo\, in a low-mass group\, or in isolation) and the timing o
 f quenching with respect to different events like infall or pericenter pas
 sage depend on the mass of the satellite galaxy. In particular\, we find t
 hat MW satellites can be efficiently quenched before infall into a MW halo
  by pre-processing in low-mass groups\, where they experience ram pressure
  comparable to that in a MW halo. Interestingly\, the density of halo gas 
 near paired Local Group-like hosts is enhanced at small angles/latitudes o
 ff the host galaxy disk versus directly above or below the disk. Prelimina
 ry results indicate that both observed and simulated satellites within the
 se low-latitude regions at z=0 may be preferentially quenched\, similar to
  recently reported anisotropic quenching in massive galaxy clusters at low
  redshift. In addition\, we briefly discuss morphological changes to low-m
 ass galaxies induced by the Local Group environment\, such as the formatio
 n of ultra diffuse galaxies via tidal shocks.\n\nhttps://iaus379.aip.de/ev
 ent/20/contributions/262/
LOCATION:Haus H\, Telegrafenberg
URL:https://iaus379.aip.de/event/20/contributions/262/
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