Sign on

SAO/NASA ADS Astronomy Abstract Service


· Find Similar Abstracts (with default settings below)
· Full Refereed Journal Article (PDF/Postscript)
· Full Refereed Scanned Article (GIF)
· References in the article
· Citations to the Article (114) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (5)
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
The evolution of bright, optically selected QSOs
Authors:
Hewett, Paul C.; Foltz, Craig B.; Chaffee, Frederic H.
Affiliation:
AA(Cambridge Univ. Inst. of Astronomy, United Kingdom), AB(Multiple Mirror Telescope Observatory, Tucson, AZ), AC(Multiple Mirror Telescope Observatory, Tucson, AZ)
Publication:
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 406, no. 2, p. L43-L46. (ApJL Homepage)
Publication Date:
04/1993
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Active Galactic Nuclei, Astronomical Models, Quasars, Luminosity, Red Shift, Space Density
DOI:
10.1086/186782
Bibliographic Code:
1993ApJ...406L..43H

Abstract

An analysis of 1049 QSOs and AGN from the Large Bright QSO Survey to produce new constraints on the shape and evolutionary behavior of the bright end of the QSO luminosity function is presented. The data represent more than an order of magnitude improvement for redshifts in the range of 0.2 to 3, and absolute magnitudes corresponding to apparent magnitudes of 16.5 to 18.85. In the Large Bright QSO Survey sample, the shape of the luminosity function changes systematically as a function of redshift, becoming steeper at larger redshifts. Compared to current models, the rate of evolution is less rapid over the redshift range 0.2 to 2, but continues, at a significantly reduced rate, until at least redshift of about 3.

Printing Options

Print whole paper
Print Page(s) through

Return 600 dpi PDF to Acrobat/Browser. Different resolutions (200 or 600 dpi), formats (Postscript, PDF, etc), page sizes (US Letter, European A4, etc), and compression (gzip,compress,none) can be set through the Printing Preferences



More Article Retrieval Options

HELP for Article Retrieval


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

  New!

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