Northwestern University

May
19
Fri 4:00 PM

Laura Newburgh: New Probes of Old Structure: Cosmology with 21cm Intensity Mapping and the Cosmic Microwave Background

When: Friday, May 19, 2017
4:00 PM - 5:00 PM  

Where: Technological Institute, L211, 2145 Sheridan Road, Evanston, IL 60208 map it

Audience: Faculty/Staff - Student - Public - Post Docs/Docs - Graduate Students

Contact: Yassaman   847.491.7650

Group: Physics and Astronomy Colloquia

Category: Academic

Description:

Title: New Probes of Old Structure: Cosmology with 21cm Intensity Mapping and the Cosmic Microwave Background

Speaker: Laura Newburgh, Yale

Abstract: Current cosmological measurements have left us with deep questions about our Universe: What caused the expansion of the Universe at the earliest times? How did structure form? What is Dark Energy and does it evolve with time? New experiments like CHIME, HIRAX, and ACTPol are poised to address these questions through 3-dimensional maps of structure and measurements of the polarized Cosmic Microwave Background. In this talk, I will describe how we will use 21cm intensity measurements from CHIME and HIRAX to place sensitive constraints on Dark Energy between redshifts 0.8 -- 2.5, a poorly probed era corresponding to when Dark Energy began to impact the expansion history of the Universe. I will also discuss how we will use data from new instruments on the ACT telescope to constrain cosmological parameters like the total neutrino mass and probe structure at late times.

Host: Ulmer

Speaker Schedule

Keywords: Physics, Astronomy, colloquium

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