CMB Observations for Large-Scale Structure

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• James Bartlett (APC)
• Monday 11 February 2019, 13:00-14:00
• CMS, Pav. B, CTC Common Room (B1.19) [Potter Room].

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

Apart from telling us about the early universe, observations of the cosmic microwave background (CMB) are proving to be a powerful probe of large-scale structure and its evolution, offering the opportunity to answer some key questions in both cosmology and galaxy formation. These studies, started with recent experiments, have become central elements of the science case for future CMB surveys. We will focus on two areas: The new technique of using CMB lensing to measure object masses, looking in particular at calibration of the galaxy cluster mass scale, and observing the circumgalactic medium (CGM) with the Sunyaev-Zeldovich (SZ) effect. The former technique has implications for constraints from cluster cosmology and will provide a view of the light-dark matter connection. The SZ effect gives us a powerful new tool for probing the distribution of the CGM . This elusive gas phase contains at least 90% of the baryons today, but remains very difficult observe, leaving us in the dark concerning a key element of galaxy formation and baryonic history.

This talk is part of the Cosmology Lunch series.

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