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Center for Astrophysics Research and Technologies Seminar Series Information

 

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Searching for the fingerprints of the first stars and black holes

Friday February 10, 2017
4:00 pm


 Presenter:  Judd D. Bowman, Arizona State University
 Series:  Physics and Astronomy Colloquium
 Abstract:  When did the first star form? How massive was it? And what happened when it died? Answering these questions is key to understanding the formation of structure in the Universe. In this talk, I will describe a novel observational approach that is poised to address our most fundamental questions about the era of Cosmic Dawn over 13 billion years ago.
Measurement of the all-sky low-frequency radio spectrum has the potential to constrain the basic properties of early stars and black holes. After they formed, the stars and black holes produced ultraviolet and X-ray radiation that heated and ionized the surrounding hydrogen gas. These effects are predicted to be observable through the 21 cm radio line of the gas.
 Host:  Gregory Taylor
 File:  http://panda3.phys.unm.edu:/videos/Colloquium-170210-Bowman.mp4
 Location:  Room 125, Dane Smith Hall
 

Refreshments will be available before the colloquium, at 03:45 pm, in in the lobby of Dane Smith Hall.

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