Dr. Eyal Kazin
I am interested in learning about cosmology through the large-scale structure.
Maps of galaxy distribution teach us how the Universe has evolved since the its early near homogeneous and isotropic form seen in the Cosmic Microwave Background (CMB) measurements. Matter, which the galaxies trace, is bound both to gravitational pull and the expansion of the Universe, and hence provides a test bed of General Relativity on cosmic scales as well as the nature of the recent (z<1) cosmic acceleration.
I am currently working on a few tools of investigation.
The Baryonic Acoustic Feature is a residual of early Universe plasma waves that left their imprint both in CMB temperature fluctuations as well as the matter power spectrum. Using its characteristic length of 150 Mpc (~half a billion light years), we can use it to test the geometry of the Universe and ultimately distinguish between dark energy models.Redshift distortions is a technique for testing gravity on very large-scales (>10 Mpc). When galaxy redshifts are used as probes of distance, the Hubble flow is degenerate with peculiar velocities, causing apparent anisotropic distortions in galaxy mappings. By modeling for these velocities we can learn about the gravity from which they are generated.
I am developing techniques to use these tools, and am applying to galaxy maps from the Australian WiggleZ Dark Energy Survey and the Sloan Digital Sky Survey, with the goal of constraining cosmological models.
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