Optical Luminosity Function of Quasi Stellar Objects
American Journal of Astronomy and Astrophysics
Volume 4, Issue 6, November 2016, Pages: 78-82
Received: Oct. 29, 2016; Accepted: Nov. 11, 2016; Published: Dec. 8, 2016
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Authors
Salam Ajitkumar Singh, Department of Physics, Manipur University, Imphal, India
Irom Ablu Meitei, Department of Physics, Modern College, Imphal, India
Kangujam Yugindro Singh, Department of Physics, Manipur University, Imphal, India
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Abstract
We study the shape of the optical luminosity function of Quasi Stellar Objects (QSOs) from the Sloan Digital Sky Survey Data Release Seven (SDSS DR7) over the redshift range 0.3 ≤ Z ≤ 2.4. By using the Levenberg-Marquardt method of nonlinear least square fit, the observed QSO luminosity function is fitted by a double power-law model with luminosity evolution characterized by a second order polynomial in redshift. For a flat universe with Ωm=0.3 and Ω Λ=0.7, we determine the best-fitting optical luminosity function model parameters.
Keywords
Quasars: General, Quasars: Supermassive Black Holes, Galaxies: Luminosity Function
To cite this article
Salam Ajitkumar Singh, Irom Ablu Meitei, Kangujam Yugindro Singh, Optical Luminosity Function of Quasi Stellar Objects, American Journal of Astronomy and Astrophysics. Vol. 4, No. 6, 2016, pp. 78-82. doi: 10.11648/j.ajaa.20160406.12
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Copyright © 2016 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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