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Title: The optical, infrared and radio properties of extragalactic sources observed by SDSS, 2mass and first surveys

Abstract

We positionally match sources observed by the Sloan Digital Sky Survey (SDSS), the Two Micron All Sky Survey (2MASS), and the Faint Images of the Radio Sky at Twenty-cm (FIRST) survey. Practically all 2MASS sources are matched to an SDSS source within 2 arcsec; {approx} 11% of them are optically resolved galaxies and the rest are dominated by stars. About 1/3 of FIRST sources are matched to an SDSS source within 2 arcsec; {approx} 80% of these are galaxies and the rest are dominated by quasars. Based on these results, we project that by the completion of these surveys the matched samples will include about 10{sup 7} and 10{sup 6} galaxies observed by both SDSS and 2MASS, and about 250,000 galaxies and 50,000 quasars observed by both SDSS and FIRST. Here we present a preliminary analysis of the optical, infrared and radio properties for the extragalactic sources from the matched samples. In particular, we find that the fraction of quasars with stellar colors missed by the SDSS spectroscopic survey is probably not larger than {approx} 10%, and that the optical colors of radio-loud quasars are {approx} 0.05 mag. redder (with 4{sigma} significance) than the colors of radio-quiet quasars.

Authors:
Publication Date:
Research Org.:
Fermi National Accelerator Lab., Batavia, IL (US)
Sponsoring Org.:
USDOE Office of Energy Research (ER) (US)
OSTI Identifier:
802170
Report Number(s):
FERMILAB-Conf-01/401-A
TRN: US0205701
DOE Contract Number:  
AC02-76CH03000
Resource Type:
Conference
Resource Relation:
Conference: Byurakan Astrophysical Observatory: Byurakan 378433, Aragatzotn (AM), 06/18/2001--06/22/2001; Other Information: PBD: 8 Oct 2002
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; GALAXIES; QUASARS; STARS; OPTICAL PROPERTIES

Citation Formats

Z. Ivezic et al. The optical, infrared and radio properties of extragalactic sources observed by SDSS, 2mass and first surveys. United States: N. p., 2002. Web.
Z. Ivezic et al. The optical, infrared and radio properties of extragalactic sources observed by SDSS, 2mass and first surveys. United States.
Z. Ivezic et al. Tue . "The optical, infrared and radio properties of extragalactic sources observed by SDSS, 2mass and first surveys". United States. https://www.osti.gov/servlets/purl/802170.
@article{osti_802170,
title = {The optical, infrared and radio properties of extragalactic sources observed by SDSS, 2mass and first surveys},
author = {Z. Ivezic et al.},
abstractNote = {We positionally match sources observed by the Sloan Digital Sky Survey (SDSS), the Two Micron All Sky Survey (2MASS), and the Faint Images of the Radio Sky at Twenty-cm (FIRST) survey. Practically all 2MASS sources are matched to an SDSS source within 2 arcsec; {approx} 11% of them are optically resolved galaxies and the rest are dominated by stars. About 1/3 of FIRST sources are matched to an SDSS source within 2 arcsec; {approx} 80% of these are galaxies and the rest are dominated by quasars. Based on these results, we project that by the completion of these surveys the matched samples will include about 10{sup 7} and 10{sup 6} galaxies observed by both SDSS and 2MASS, and about 250,000 galaxies and 50,000 quasars observed by both SDSS and FIRST. Here we present a preliminary analysis of the optical, infrared and radio properties for the extragalactic sources from the matched samples. In particular, we find that the fraction of quasars with stellar colors missed by the SDSS spectroscopic survey is probably not larger than {approx} 10%, and that the optical colors of radio-loud quasars are {approx} 0.05 mag. redder (with 4{sigma} significance) than the colors of radio-quiet quasars.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Oct 08 00:00:00 EDT 2002},
month = {Tue Oct 08 00:00:00 EDT 2002}
}

Conference:
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