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Astronomy Colloquium - "Toward an Understanding of Quasar Variability with a Sample of Changing-Look Quasars "

Event Type
Seminar/Symposium
Sponsor
Department of Astronomy
Location
134 Astronomy
Date
Nov 14, 2017   3:45 pm  
Speaker
Chelsea Macleod, Harvard University
Contact
Rebecca Bare
E-Mail
rsbare@illinois.edu
Phone
217-333-3090
Views
35
Originating Calendar
Astronomy Colloquium Speaker Calendar
In the era of time domain astronomy, repeat photometric observations spanning over a decade are enabling a systematic exploration of quasar variability. Repeat spectroscopy spanning over a decade is revealing intriguing variability in Type I quasars, such as "changing-look quasars" which exhibit large changes in the broad components of Balmer emission lines. I present recent follow-up spectra of changing-look candidates selected based on SDSS and Pan-STARRS variability. Such sources highlight the importance of obtaining large samples of quasars with repeat spectroscopy, one of the goals of the Time Domain Spectroscopic Survey of SDSS-IV and future all-sky spectroscopic surveys. 
 

 

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