Dark Matter Mysteries and Galaxy Evolution – Dr. Tommaso Treu

(March 15, 2011)  According to our current understanding, most of the mass of the universe is in the form of a mysterious substance, known as dark matter, that does not emit or absorb light. We do not know what dark matter is made of, but we see it manifest itself at astronomical scales through its gravitational effects. Although the cosmological model based on dark matter works quite well on very large scales, there appears to be tension at subgalactic scales, where dark matter interacts with regular matter. Professor Treu will present his research on this shadowy component of the cosmos and discuss some intriguing questions in dark matter cosmology.

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Observers from UC-lbnl/UCD will use MOSFIRE on Keck 1, while on Keck 2, UCD observers will use DEIMOS. Sun set 06:54:00pm rise 05:45:00am
On Keck 1, we have UH observers using MOSFIRE. On Keck 2, we have UCD observers using DEIMOS. Sun set 06:54:00pm rise 05:46:00am
UH observers will use MOSFIRE on Keck 1, and UCSC/UCLA observers will use ESI on Keck 2 tonight. Sun set 06:53:00pm rise 05:46:00am
Keck 1 target of opportunity! Detected the afterglow of a rare short-duration gamma ray burst. Extragalactic explosion, caught in the act.
Does this monster have exotic populations of stars at its center? We'll investigate with LRIS tonight. (3/3)