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PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-2610
DTSTART:20120224T180000Z
DTEND:20120224T191000Z
DTSTAMP:20260416T171229Z
LAST-MODIFIED:20120215T210148Z
LOCATION:4421 Sterling Hall
SUMMARY:The early Evolution of the Milky Way Satellite Galaxies\, Spec
 ial NOON Astronomy Talk\, Professor Gerhard Hensler\, Institute of Ast
 ronomy\, University of Vienna
DESCRIPTION:The dwarf spheroidal galaxies (dSphs) around the Milky Way
  (MWG)<br>
\nbelong to the most poorly understood class of astronomica
 l objects<br>
\nand serve as the most challenging targets of astrophys
 ical researchfor various reasons:<br>
\nAt first\, in LCDM cosmology a
  huge number of subhalos are expected<br>
\nto surround massive galaxi
 es what is contrasted by the observed number of satellite galaxies aro
 und the MWG. In addition\, it is debated whether the recently detected
  ultra-faint dSphs can account for this mismatch.<br>
\nSecondly\, the
  still at present observable accretion of satellite galaxies by the MW
 G should have led to the built-up of the Galactic halo and left behind
  kinematic and chemical witnesses by their stars. Besides that these e
 xpected signatures and similarities between halo stars and existing dS
 phs are not observed\, also their spatial distribution and number pose
  serious questions to our understanding of satellite-galaxy<br>
\nevol
 ution. To solve these problems numerical simulations from cosmological
  to galactic scales and semi-analytical galaxy models have been undert
 aken by numerous authors which will be highlighted\, but also critical
 ly reviewed here.<br>
\nNew comprehensive approaches will be presented
  and their results compared with observations. 
URL:https://www.physics.wisc.edu/events/?id=2610
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