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Grier

Astronomy Colloquium - "Reverberation Mapping and Quasar Physics with the Sloan Digital Sky Survey"

Event Type
Seminar/Symposium
Sponsor
Department of Astronomy
Location
https://go.illinois.edu/AstronomyColloquiumVirtualLink
Virtual
wifi event
Date
Oct 26, 2021   3:45 pm  
Speaker
Dr. Kate Grier, University of Arizona
Contact
Rebecca Bare
E-Mail
rsbare@illinois.edu
Phone
217-265-8226
Views
11
Originating Calendar
Astronomy Colloquium Speaker Calendar

Supermassive black holes (SMBHs) are thought to be present in nearly every galaxy in the Universe, and observed correlations between the masses of SMBHs and various properties of the galaxies they live in suggest a possible connection between the growth of SMBHs and the growth of their host galaxies. To understand this connection, we require accurate measurements of supermassive black hole masses in galaxies across the entire universe, as well as an understanding of the physical environment surrounding the SMBHs. Active galactic nuclei and quasars are highly variable, and we can use their variability in a variety of ways to learn about the physical conditions within the active nuclei as well as measure the masses of their central SMBHs. Among other techniques, we use the variability of broad emission lines to measure black hole masses and learn about the broad-line region in quasars (via reverberation mapping) and the variability of broad absorption lines to probe outflows that are launched from the quasar accretion disks. I will discuss the use of time variability -- primarily as applied to reverberation mapping and broad absorption-line studies -- to learn about quasars. I will focus specifically on my recent and planned work on large-scale reverberation-mapping projects using data from large surveys such as the Sloan Digital Sky Survey, which have allowed us to investigate large numbers of quasars at much greater distances than ever before.  

Topic: Astronomy Department Colloquium
Time: This is a recurring meeting Meet anytime

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