Astronomy Colloquium

October 17, 2017
Thursday, October 26, 2017 - 2:30pm to 3:30pm
1080 Physics Research Building
OSU Astronomy Colloquium (Image Source: NASA)

Decoding the X-Ray Echoes of Black Holes 

Abderahmen Zoghbi - University of Michigan

X-ray reverberation has emerged as a powerful tool to probe accretion at the scales of the black hole horizon. It relies on measuring light-travel the time delays between direct emission and its reflection off the surrounding dense material. These reverberation lags have been seen in a significant fraction of bright AGN, and they all imply a very compact corona. Combining these measurements with black hole coronal temperatures observed with NuSTAR, we are learning new details about the illusive corona and its properties. I will discuss recent reverberation results and their implications on our understanding of the inner regions of accreting black holes.

Coffee and Donuts will be served at 2:00pm in 4054 McPherson Lab. 

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