Simon Fraser University
SFU Cosmology Seminars

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Friday, 30 October 2015, 14:30 in C9000

Prof. Mark Halpern (UBC)

Measuring the acceleration history of the Universe with CHIME (physics colloquium)

Density fluctuations in the Universe before the hot big bang propagated in the plasma of the early universe as acoustic waves. They produced the features which we have measured in the Comic Microwave Background and used to constrain the age and composition of the Universe. When the Universe became transparent, these density waves stopped moving, leaving spherical features of known (enormous) size. We are building a novel radio telescope, CHIME, to measure the apparent size of these features as a function of redshift in an effort to determine the expansion history of the Universe and constrain models of dark energy. I will review what we have learned from these baryon acoustic oscillations in the CMB and give a progress report on CHIME.

Seminars in 2015:

2015-10-30 14:30 in C9000 - Mark Halpern (UBC): Measuring the acceleration history of the Universe with CHIME (physics colloquium)
2015-11-06 14:30 in C9000 - John Kormendy (University of Texas at Austin): Supermassive black holes in galaxy nuclei: Coevolution (or not) of black holes and host galaxies (physics colloquium)
2016-03-01 15:00 in P8445B - Gabor Kunstatter (University of Winnipeg): Formation and evaporation of nonsingular black holes in new 2d gravity
2016-03-17 14:30 in P8445B - Francesc Ferrer (Washington University in St Louis): Managing astrophysical uncertainties in dark matter detection
2016-08-04 14:30 in P8445B - Alexander Vikman (IoP of the Czech Academy of Sciences): Canonical exorcism for cosmological ghosts

[ See complete seminar archives | iCal feed ]

Modified by Andrei Frolov <frolov@sfu.ca> on 2023-11-01