Optical Luminosity Function of Quasi Stellar Objects

  title={Optical Luminosity Function of Quasi Stellar Objects},
  author={S. A. Singh and I. A. Meitei and K. Y. Singh},
  • S. A. Singh, I. A. Meitei, K. Y. Singh
  • Published 2016
  • Physics
  • 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… CONTINUE READING

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