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SUMMARY:Understanding the formation of the extremely diffuse Andromeda XIX
  dwarf galaxy
DTSTART;VALUE=DATE-TIME:20230322T080000Z
DTEND;VALUE=DATE-TIME:20230322T082500Z
DTSTAMP;VALUE=DATE-TIME:20241114T092427Z
UID:indico-contribution-177@meetings.aip.de
DESCRIPTION:Speakers: Michelle Collins (University of Surrey)\nAndromeda (
 And) XIX is a unique dwarf galaxy in the M31 system. Its large half-light 
 radius (in excess of 3 kpc) and low surface brightness (29.3 magnitudes pe
 r square arcsecond) make it one of the most diffuse galaxies in the known 
 Universe. In addition to its extreme structural properties\, its dynamics 
 also suggest that it sits in a low density dark matter halo that may have 
 been shaped by tidal forces. To understand how such a galaxy could form\, 
 we acquired deep HST imaging to resolve stars in this system down to its o
 ldest main sequence turn-off. These allow us to measure a detailed star fo
 rmation history for And XIX for the first time. In this talk\, I will pres
 ent our findings from these data in concert with chemodynamical observatio
 ns. These will allow me to confront various theories for the formation of 
 And XIX and discuss how such galaxies may form.\n\nhttps://iaus379.aip.de/
 event/20/contributions/177/
LOCATION:Haus H\, Telegrafenberg
URL:https://iaus379.aip.de/event/20/contributions/177/
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