Galaxy-dark matter connection: the large scale structure view

Event Date: 

Tuesday, March 12, 2013 - 4:00pm

Event Location: 

  • Broida 1640

Event Contact: 

Refreshments served at 3:40

Speaker:

Uros Seljak - University of California, Berkeley

Large scale distribution of galaxies is believed to be determined by the dark matter distribution, but their detailed relationship remains unknown. Weak lensing and galaxy clustering can be used to study their relationship, which if understood will allow us to extract cosmological parameters from the large scale structure (LSS) surveys. I will review the promise of LSS to determine questions of fundamental significance such as inflation, neutrino mass, dark matter and dark energy. I will discuss our current understanding of the connection between the galaxies and the dark matter clustering, focusing on galaxy biasing and redshift space distortions. I will also discuss potential astrophysical complications such as relative velocity between baryons and dark matter at high redshift, which may modulate the spatial distribution of galaxies we observe today.