Sign on

SAO/NASA ADS Astronomy Abstract Service

· Find Similar Abstracts (with default settings below)
· Electronic Refereed Journal Article (HTML)
· Full Refereed Journal Article (PDF/Postscript)
· References in the article
· SIMBAD Objects (23)
· NED Objects (21)
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
The distant red galaxy neighbour population of 1 <~ z <~ 2 QSOs and optically obscured sources
Authors:
Bornancini, Carlos G.; Lambas, Diego García
Affiliation:
AA(Grupo de Investigaciones en Astronomía Teórica y Experimental, IATE Observatorio Astronómico, Universidad Nacional de Córdoba Laprida 854, X5000BGR, Córdoba, Argentina; Secretaría de Ciencia y Técnica de la Universidad Nacional de Córdoba), AB(Grupo de Investigaciones en Astronomía Teórica y Experimental, IATE Observatorio Astronómico, Universidad Nacional de Córdoba Laprida 854, X5000BGR, Córdoba, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Avenida Rivadavia 1917, C1033AAJ, Buenos Aires, Argentina)
Publication:
Monthly Notices of the Royal Astronomical Society, Volume 377, Issue 1, pp. 179-184. (MNRAS Homepage)
Publication Date:
05/2007
Origin:
MNRAS
MNRAS Keywords:
galaxies: high-redshift , quasars: general , large-scale structure of Universe
Abstract Copyright:
(c) 2007 The Authors. Journal compilation © 2007 RAS
DOI:
10.1111/j.1365-2966.2007.11577.x
Bibliographic Code:
2007MNRAS.377..179B

Abstract

We study the distant red galaxy (DRG; J - Ks > 2.3) neighbour population of quasi-stellar objects (QSOs) selected from the Sloan Digital Sky Survey (SDSS) in the redshift range 1 <~ z <~ 2. We perform a similar analysis for optically obscured active galactic nuclei (AGNs; i.e. with a limiting magnitude I > 24) detected in the mid-infrared (24 μm) with the Spitzer Space Telescope and a mean redshift z ~ 2.2 in the Flamingos Extragalactic Survey (FLAMEX). Both QSOs and obscured AGN target samples cover 4.7 deg2 in the same region of the sky. We find a significant difference in the environment of these two target samples. Neighbouring galaxies close to QSOs tend to be bluer than galaxies in optically obscured source environments. We also present results on the cross-correlation function of DRGs around QSOs and optically faint mid-infrared sources. The corresponding correlation length obtained for the QSO sample targets is r0 = 5.4 +/- 1.6 Mpc h-1 and a slope of γ = 1.94 +/- 0.10. For the optically obscured galaxy sample, we find r0 = 8.9 +/- 1.4 Mpc h-1 and a slope of γ = 2.27 +/- 0.20. These results indicate that optically faint obscured sources are located in denser environment of evolved red galaxies compared to QSOs.

Based on observations and/or data products by the Flamingos Extragalactic Survey. FLAMINGOS was designed and constructed by the IR instrumentation group (PI: R. Elston) at the University of Florida, Department of Astronomy, with support from NSF grant AST97-31180 and Kitt Peak National Observatory.

E-mail: bornancini@oac.uncor.edu

Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)
   

Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints
    


SAO/NASA ADS Homepage | ADS Sitemap | Query Form | Basic Search | Preferences | HELP | FAQ