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UID:UW-Physics-Event-9438
DTSTART:20251016T203000Z
DTEND:20251016T213000Z
DTSTAMP:20260413T084228Z
LAST-MODIFIED:20250930T112506Z
LOCATION:4421 Sterling Hall
SUMMARY:Witnessing the End of Star Formation in Galaxies\, a Post-Star
 burst Story\, Astronomy Colloquium\, Prof. Ann Zabludoff\, University 
 of Arizona
DESCRIPTION:While astronomers are now detecting very early galaxy form
 ation and tracing galaxy evolution over a Hubble time\, we remain baff
 led by the present-day dichotomy between disky galaxies that are formi
 ng stars and spheroidal galaxies that are not. The key is to find gala
 xies in transition from one class to the other\, preferably in the nea
 rby universe where we have access to an abundance of spatially resolve
 d and multi-wavelength data. We have now identified thousands of such 
 "post-starburst galaxies" whose dynamics\, stellar populations\, star 
 clusters\, and morphologies are consistent with recent\, dramatic evol
 ution. This evolution often arises from galaxy-galaxy interactions and
  is connected in complex ways to the galaxy's central\, supermassive b
 lack hole and newly formed stars. For reasons that we are working to e
 xplain\, these galaxies are the preferred sites for stellar tidal disr
 uptions by supermassive black holes\, a surprising link between sub-pc
  and kpc scales reminiscent of the black hole-galaxy bulge mass relati
 on. Regardless of the physical mechanism that drives it\, the preferen
 ce for certain host galaxies is a valuable tool for rapidly classifyin
 g these rare astrophysical transients\, especially in the era of advan
 cing AI and the Vera Rubin Observatory's Legacy Survey of Space and Ti
 me.
URL:https://www.physics.wisc.edu/events/?id=9438
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