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A Clash of Clusters Provides New Clue to Dark Matter
Special ACKS Seminar: Dragan Huterer
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Cosmology Seminar: TJ Cox (CfA/Harvard)
| What | seminar cosmology |
|---|---|
| When |
03 March 08 from 11:00 am to 12:00 pm |
| Where | Varian Room 355 |
| Contact Name | Laura Duato |
| Contact Email | lduato@stanford.edu |
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Unraveling the Formation History of Elliptical Galaxies
The idea that galaxies in general, and elliptical galaxies in particular, are shaped by their merger history has gained widespread acceptance. However, a detailed mapping between specific merger histories, and the wide variety of galaxies observed is still uncertain. By using a comprehensive set of numerical simulations, we show that a single
disk-disk merger, as originally proposed by the "merger hypothesis," is a plausible mechanism to form many elliptical galaxies provided that dissipation is involved. We also show that additional (merger?) processes are likely needed to form the largest ellipticals and we outline several properties commonly observed in elliptical galaxies that may provide
insight into their formation history.
KIPAC tea talk, Speaker: Lukasz Stawarz