Kathryn Johnston
Kathryn Johnston Kathryn Johnston
Summary The BIG picture: (i) stellar halos are built inside out from a few massive dwarfs; (ii) bulk of halo accreted much earlier than surviving satellites. Natural consequences of Lambda CDM: => features from recent events at ~30 mag/arcsec^2 common => these represent relatively rare, late-infall events => abundance patterns in late accretions and surviving satellites different from rest of halo => cuts in alpha-abundance will be sensitive to different accretion times
- Page 1 and 2: Stellar Halos and Satellite Systems
- Page 3 and 4: Dark matter modeled via merger tree
- Page 5 and 6: Model for Formation of a Halo Color
- Page 7 and 8: Features brighter than 30 mag/ arcs
- Page 9 and 10: Model for Formation of a Halo - Hal
- Page 11 and 12: Abundance Patterns in Satellites vs
- Page 13 and 14: Abundance Patterns in Satellites vs
- Page 15 and 16: Abundance Patterns in Satellites vs
- Page 17: ... only stars with [alpha/ Fe]
Summary<br />
The BIG picture: (i) stellar halos are built inside<br />
out from a few massive dwarfs; (ii) bulk of halo<br />
accreted much earlier than surviving satellites.<br />
Natural consequences of Lambda CDM:<br />
=> features from recent events at ~30 mag/arcsec^2<br />
common<br />
=> these represent relatively rare, late-infall events<br />
=> abundance patterns in late accretions and<br />
surviving satellites different from rest of halo<br />
=> cuts in alpha-abundance will be sensitive to<br />
different accretion times
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