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SUMMARY:The Stellar Halos of the Milky Way as seen by SDSS - Daniela Carol
 lo (ANU)
DTSTART:20100825T124500Z
DTEND:20100825T131500Z
UID:TALK25592@talks.cam.ac.uk
CONTACT:Dr Jonathan Gair
DESCRIPTION:Recent evidence that the Galactic halo have been formed by acc
 retion of sub-galactic fragments comes from the analysis of Carollo et al.
  (2007\, 2010)\, based on a large sample of calibration stars from the Slo
 an Digital Sky Survey (SDSS) DR5 and SDSS SEGUE DR7. Carollo et al. argued
  for the existence of at least a two-component halo. In their view\, the G
 alactic halo comprises two broadly overlapping structural components\, an 
 inner and an outer halo. These components exhibit different spatial densit
 y profiles\, stellar orbits\, velocity ellipsoids and stellar metallicitie
 s. I will present the general properties of the two stellar halo component
 s\, and evidence that they may have experienced a distinct chemical enrich
 ment at early epochs of the Galaxy's formation\, through an analysis of th
 e Carbon-Enhanced Metal-Poor (CEMP) stars in the inner- and outer-halo pop
 ulations.
LOCATION:Sackler Lecture Theatre\, IoA
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