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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LRIS-ADC and DEIMOS are the instruments tonight. Observers are from UCLA and UCSC. Sun set 06:04:00pm rise 06:09:00am
Here on Keck 2 the 1st of our 2 primary fields has just risen above the horizon, so we are busily collecting photons from distant galaxies.
Howdy! This is @rhaegal on Keck 2 with grad student Intae, searching for the most distant galaxies with deep spectroscopy on DEIMOS.
Tonight's schedule is LRIS-ADC on Keck 1 and DEIMOS on Keck 2 for our lucky observers from UCLA and NASA. Sun set 06:04:00pm rise 06:09:00am
Griffith Observatory TV on Livestream. bit.ly/1tJbDNx