UV Variability Selected Active Galactic Nuclei in the GALEX Deep Imaging Survey

Details UV Variability Selected Active Galactic Nuclei in the GALEX Deep Imaging Survey UV Variability Selected Active Galactic Nuclei in the GALEX Deep Imaging Survey

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21543324g&link_type=abstract

American Astronomical Society, AAS Meeting #215, #433.24; Bulletin of the American Astronomical Society, Vol. 42, p.374

Astronomy and Astrophysics

Astronomy

Scientific paper

We present a sample of active galactic nuclei (AGNs) selected from the UV variability and optical colors and morphology of sources in 7.6 deg2 of the GALEX Deep Imaging Survey matched with the Sloan Digital Sky Survey (SDSS) imaging catalog. We compare yearly co-added epochs of deep GALEX FUV and NUV imaging to measure variability down to deltamag=24. We include spectroscopy for 35% of the sample from the SDSS spectroscopic catalog and from our own spectroscopic follow-up program with the Keck 10m, MDM 2.4m and the APO 3.5m telescopes. In our heterogeneous population of low-luminosity AGNs, Seyferts, and quasars at redshifts ranging from z=0.1 to z=2.0, we detect UV variability amplitudes of up to a factor of 10 on a year timescale, and a ubiquitous trend towards bluer FUV-NUV color during high states of flux. For the first time, we characterize the UV variability properties of a large sample of AGNs with a wide range of luminosities, and compare them to the expectations of accretion disk theory. We also present the exciting capabilities of the GALEX Time Domain Survey, which continuously monitors one of the 7 deg2 Pan-STARRS 1 Medium Deep Survey fields with a cadence of days, and will yield hundreds of AGNs with simultaneous UV and optical light curves.

Affiliated with

Also associated with

No associations

Rating

UV Variability Selected Active Galactic Nuclei in the GALEX Deep Imaging Survey does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with UV Variability Selected Active Galactic Nuclei in the GALEX Deep Imaging Survey, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and UV Variability Selected Active Galactic Nuclei in the GALEX Deep Imaging Survey will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-968377