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VERSION:2.0
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PRODID:UW-Madison-Physics-Events
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SEQUENCE:1
UID:UW-Physics-Event-8146
DTSTART:20230126T213000Z
DTEND:20230126T223000Z
DTSTAMP:20260414T054753Z
LAST-MODIFIED:20230120T144336Z
LOCATION:4421 Sterling Hall
SUMMARY:Seeking the nature of dark matter with the Milky Way halo and 
 wide-field photometric surveys\, Astronomy Colloquium\, Peter Ferguson
 \, UW-Madison
DESCRIPTION:The outer Milky Way halo is extremely dark matter dominate
 d\, and its stellar content is made up of accreted substructures that 
 did not form in our Galaxy. Finding and characterizing these substruct
 ures\, particularly ultra-faint dwarf galaxies and stellar streams\, p
 rovides a unique probe of the nature and distribution of dark matter i
 n the Milky Way. These efforts have been enabled by wide field photome
 tric surveys such as the Sloan Digital Sky Survey (SDSS) and the Dark 
 Energy Survey (DES). To continue to make progress in these efforts wit
 h current and upcoming surveys it is important to calibrate the data p
 roducts precisely and understand the various survey selection function
 s. In this talk\, I will discuss how we can learn about the nature of 
 dark matter by studying the Milky Way halo substructures. Then I will 
 share some of our efforts to find and characterize these substructures
 \, focusing on stellar streams\, with current surveys like the DECam L
 ocal Volume Exploration Survey (DELVE).  Finally\, I will discuss the 
 current status of the Vera C. Rubin observatory and our efforts to ens
 ure future discoveries with the Legacy Survey of Space and Time (LSST)
  through careful verification and validation of the survey data.
URL:https://www.physics.wisc.edu/events/?id=8146
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