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https://doi.org/10.1086/300645

has been cited by the following article:

• TITLE: New Probability Distributions in Astrophysics: I. The Truncated Generalized Gamma

  AUTHORS: Lorenzo Zaninetti

  KEYWORDS: Probability Distributions, Quasars, Galaxies

  JOURNAL NAME: International Journal of Astronomy and Astrophysics, Vol.9 No.4, December 23, 2019

  ABSTRACT: The gamma function is a good approximation to the luminosity function of astrophysical objects, and a truncated gamma distribution would permit a more rigorous analysis. This paper examines the generalized gamma distribution (GG) and then introduces the scale and the new double truncation. The magnitude version of the truncated GG distribution with scale is adopted in order to fit the luminosity function (LF) for galaxies or quasars. The new truncated GG LF is applied to the five bands of SDSS galaxies, to the 2dF QSO Redshift Survey in the range of redshifts between 0.3 and 0.5, and to the COSMOS QSOs in the range of redshifts between 3.7 and 4.7. The average absolute magnitude versus redshifts for SDSS galaxies and QSOs of 2dF was modeled adopting a redshift dependence for the lower and upper absolute magnitude of the new truncated GG LF.