PIRSA:14090077

Video URL

http://pirsa.org/14090077

Cosmic flows: testing gravity and the matter power spectrum on very large scales

Hudson, M. (2014). Cosmic flows: testing gravity and the matter power spectrum on very large scales. Perimeter Institute for Theoretical Physics. http://pirsa.org/14090077

Hudson, Mike. Cosmic flows: testing gravity and the matter power spectrum on very large scales. Perimeter Institute for Theoretical Physics, Sep. 16, 2014, http://pirsa.org/14090077 

          @misc{ scivideos_PIRSA:14090077,
            doi = {},
            url = {http://pirsa.org/14090077},
            author = {Hudson, Mike},
            keywords = {Cosmology},
            language = {en},
            title = {Cosmic flows: testing gravity and the matter power spectrum on very large scales},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2014},
            month = {sep},
            note = {PIRSA:14090077 see, \url{https://scivideos.org/PIRSA/14090077}}
          }

Mike Hudson University of Waterloo

Source Repository PIRSA
Collection
Talk Type Scientific Series
Subject

Abstract

Peculiar velocities - deviations from Hubble expansion - are the only practical probe of the growth of matter density fluctuations on very large scales in the nearby Universe. I will discuss recent measurements of quantities of cosmological interest from our group and others. One is the "bulk" flow of nearby galaxies with respect to the frame defined by the Cosmic Microwave Background, and what this tells us about fluctuations on large very spatial scales. The second is the measurement of the growth rate of fluctuations, a critical test of Lambda CDM and modified gravity models.