Dark Energy and Cosmic Sound

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• Daniel Eisenstein (Harvard-Smithsonian Center for Astrophysics).
• Thursday 27 October 2016, 16:00-17:00
• Sackler Lecture Theatre, IoA (tea at 3.30 pm).

If you have a question about this talk, please contact Richard McMahon.

Sackler Lecture 2016

I will discuss how the acoustic oscillations that propagate in the photon-baryon fluid during the first million years of the Universe provide a robust method for measuring the cosmological distance scale. The distance that the sound can travel can be computed to high precision and creates a signature in the late-time clustering of matter that serves as a standard ruler. Galaxy clustering results from the Sloan Digital Sky Survey reveal this feature at a variety of redshifts. I will review our recent work on the theory and practice of the acoustic oscillation method, describe our latest cosmology results from SDSS -III on the expansion history of the Universe, and introduce the upcoming Dark Energy Spectroscopic Instrument (DESI) project.

This talk is part of the The Sackler Lectures series.

This talk is included in these lists:

• Cambridge Astronomy Talks
• Combined External Astrophysics Talks DAMTP
• Cosmology lists
• Cosmology, Astrophysics and General Relativity
• Institute of Astronomy Colloquia
• Institute of Astronomy Talk Lists
• Kavli Institute for Cosmology Talk Lists
• Priscilla
• Sackler Lecture Theatre, IoA (tea at 3.30 pm)
• The Sackler Lectures

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