Other
Scientific paper
Sep 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011head...12.2201g&link_type=abstract
American Astronomical Society, HEAD meeting #12, #22.01
Other
Scientific paper
New surveys are opening up the time domain of AGN science with wide-field, intensive monitoring and also by revealing large numbers of AGN in multi-wavelength archives that have been serendipitously observed multiple times. Variability is a powerful tool for discovering AGN that are otherwise diluted by host galaxy emission and/or blended in color space with other types of objects. We use existing SDSS Stripe 82 data to characterize the effectiveness of X-ray and optical AGN selection methods, identify environments in which AGN activity occurs, and find unusual populations such as "naked" Type 2 and active star-forming galaxies. Using a large simulation of stars, galaxies, and AGN, we demonstrate how AGN will be selected by the LSST, and examples of time-domain science that can be performed with the tens of millions of AGN that LSST will identify. In the X-rays, large (and growing) serendipitous samples are revealing how quasars vary, providing new tests of whether AGN feeding changes significantly over cosmic time, and identifying new similarities between accretion in local Seyfert AGN and luminous quasars.
Brandt Niel
Choi Yemon
Gibson Robert
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