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

 Mike Hudson

Department of Physics and Astronomy – University of Waterloo and Perimeter Institute for Theoretical Physics

Seminar in Perimeter Institute –  16 September 2014

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.

یکشنبه 10 اردیبهشت ماه 1396، ساعت 15:00

    دانشکده فیزیک، طبقه اول کلاس فیزیک 3