Measuring the Fraction of Obscured Quasars by the Infrared Luminosity of Unobscured Quasars

Details Measuring the Fraction of Obscured Quasars by the Infrared Luminosity of Unobscured Quasars Measuring the Fraction of Obscured Quasars by the Infrared Luminosity of Unobscured Quasars

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007sptz.prop40296k&link_type=abstract

Spitzer Proposal ID #40296

Physics

Scientific paper

Recent work has suggested that the ratio of obscured to unobscured AGN declines with increasing luminosity, but it has been difficult to quantify this trend. We propose to measure this ratio as a function of luminosity in a new way: by studying the ratio of mid-infrared luminosity to intrinsic nuclear bolometric luminosity in unobscured AGN. Because the mid-infrared is created by dust reprocessing of shorter wavelength nuclear light, this ratio is a diagnostic of the solid angle around the nucleus covered by obscuring matter. In order to eliminate possible redshift-dependences while also achieving a large dynamic range in luminosity, we will collect archival 24 micron MIPS photometry from objects with redshifts near 1 in three surveys: SDSS, GOODS, and COSMOS. There is already data in the Spitzer archive for ~1000 SDSS quasars and ~10 lower luminosity GOODS AGN; observations are accumulating for ~150 COSMOS AGN with luminosity similar to the GOODS objects. To measure the bolometric luminosity for each object, we will use archival optical data from these surveys, supplemented by the GALEX data that are available for many of the objects in our sample. The resulting catalogs and data products will be made public on a friendly-access webpage as soon as they are ready. This database will be updated regularly as more data becomes publicly available in the Spitzer archive. We believe that such a database will be highly beneficial for the whole community.

Affiliated with

Also associated with

No associations

Rating

Measuring the Fraction of Obscured Quasars by the Infrared Luminosity of Unobscured Quasars 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 Measuring the Fraction of Obscured Quasars by the Infrared Luminosity of Unobscured Quasars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Measuring the Fraction of Obscured Quasars by the Infrared Luminosity of Unobscured Quasars will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1748725