Physics
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21725217g&link_type=abstract
American Astronomical Society, AAS Meeting #217, #252.17; Bulletin of the American Astronomical Society, Vol. 43, 2011
Physics
Scientific paper
The LSST survey will dramatically increase the number of known active galactic nuclei (AGN), cataloging over 10 million AGN across more than 20,000 square degrees of sky. Time-domain coverage, a hallmark of the LSST survey, will enable powerful new AGN selection criteria, including the lack of proper motion and especially variability, in addition to color-based selection in deep, coadded ugrizy (320--1090 nm) images. Most of the LSST sky will be observed about 1000 times over ten years, while AGN in "deep drilling" fields will receive intense monitoring on time scales of minutes to days. Distinguishing traits of the LSST AGN survey include its coverage of the luminosity-redshift plane, its reach to high redshifts (with over 1000 AGN at z > 6.5), and the use of difference imaging to detect faint AGN surrounded by host galaxy emission or in crowded environments that challenge traditional photometry. LSST AGN will be used to determine the accretion history of supermassive black holes over cosmic time, the interaction of AGN with their evolving host galaxies and environments, the physics of AGN emission revealed by variability, and the relationship between AGN and dark matter through measurements of clustering at high redshifts. Multiwavelength analyses will benefit from matching LSST source identifications, redshifts, and light curves to archives and contemporaneous missions, and real-time LSST alerts will trigger follow-up observations. Simulated LSST images and archived SDSS Stripe 82 data are now being used to demonstrate the capabilities of the LSST AGN survey, with a current emphasis on evaluating metrics that select AGN based on their variability.
Anderson Scott F.
Ballantyne David R.
Barth Aaron J.
Brandt Wiliam N.
Brunner Robert J.
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