The Near-Infrared Variability of Quasars

Details The Near-Infrared Variability of Quasars The Near-Infrared Variability of Quasars

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21924322m&link_type=abstract

American Astronomical Society, AAS Meeting #219, #243.22

Astronomy and Astrophysics

Astronomy

Scientific paper

We explore the intrinsic variability of quasi-stellar objects (QSOs) observed as part of the NEWFIRM Medium Band Survey (MBS). Using data obtained in 6 filters between 1 - 2.2 micron, we parameterize the structure function for variability in each of the filters for the 100 spectroscopically confirmed QSOs observed during the NEWFIRM MBS.
Similar to recent optical studies we find that the structure function can be adequately modeled as a damped random walk. We characterize the differences in the variability in each of the six filters, and search for any trends between variability, redshift, and absolute magnitude. We compare this variability to that of known variable stars and examine the possibility of selecting QSOs from near-infrared (NIR) variability alone, regardless of color. Within the context of upcoming NIR synoptic surveys, e.g., WFIRST, EUCLID and SASIR, we suggest that QSOs can be discovered based on their intrinsic NIR variability.

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