Astronomy Colloquium - "Toward an Understanding of Quasar Variability with a Sample of Changing-Look Quasars "
(sign-up)Chelsea Macleod, Harvard University
|Event Contact:||Rebecca Bare
Department of Astronomy
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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