Gamma-ray luminosity function of gamma-ray bright AGNs

Bhattacharya, Debbijoy and Sreekumar, P and Mukherjee, R (2009) Gamma-ray luminosity function of gamma-ray bright AGNs. In: Reserach in Astronomy and Astrophysics, 9 (1). pp. 85-94.

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Abstract

Detection of gamma-ray emissions from a class of active galactic nuclei (viz blazars), has been one of the important findings from the Compton Gamma-Ray Observatory (CGRO). However, their gamma-ray luminosity function has not-been well determined. Few attempts have been made in earlier works, where BL Lacs and Flat Spectrum Radio Quasars (FSRQs) have been considered as a single source class. In this paper, we investigated the evolution and gamma-ray luminosity function of FSRQs and BL Lacs separately. Our investigation indicates no evolution for BL Lacs, however FSRQs show significant evolution. Pure luminosity evolution is assumed for FSRQs and exponential and power law evolution models are examined. Due to the small number of sources, the low luminosity end index of the luminosity function for FSRQs is constrained with an upper limit. BL Lac luminosity function shows no signature of break. As a consistency check, the model source distributions derived from these luminosity functions show no significant departure from the observed source distributions.

Item Type:	Journal Article
Publication:	Reserach in Astronomy and Astrophysics
Publisher:	Institute of Physics
Additional Information:	Copyrights of this article belongs to Institute of Physics.
Keywords:	galaxies: active;galaxies:evolution;galaxies:luminosity function;gamma-rays:observations.
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	22 Jul 2009 11:29
Last Modified:	19 Sep 2010 05:30
URI:	http://eprints.iisc.ac.in/id/eprint/19818

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