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LUVOIR Seminar

February

14

Studying Quasar Outflows and Weak Nuclear Activity in Galaxies via UV Spectroscopy
Mike Eracleous (Penn State)

Abstract: I will describe two types of projects that benefit tremendously by a large O-UV-IR telescope in space. The talk will be largely pedagogical. I will describe the scientific motivation behind each project, the methodology, the results that our group has obtained so far, and what progress we can make with a new facility. The first project involves the study of UV absorption lines produce by quasar outflows. These outflows can be very powerful to influence the evolution of the host galaxy. UV spectroscopy affords a probe the structure of the outflow and allows us to determine the rate at which energy is injected in the galaxy’s interstellar medium and the intergalactic medium. This is a crucial parameter for constraining models of how the quasar influences the evolution of its host galaxy. The second project involves the SPATIALLY-RESOLVED study of emission lines from gas in the immediate vicinity of the nuclei of nearby galaxies. The goal in this case is determine the mechanism that excites the gas and, by extension, the role that the mildly-accreting supermassive black hole plays in the process.

Prof. Eracleous will give the talk remotely. We will project slides in B34, E215 at Goddard.

The dial-in number is:
1844 467 6272
Passcode: 924010
Adobe Connect: https://connect.arc.nasa.gov/luvoir/

 
Date February 14, 2018
Start/End Time 11:00 AM - 12:00 PM
Location B34, E215
Website https://asd.gsfc.nasa.gov/luvoir/events/
Event Type Seminars/Colloquia
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