Optical Luminosity Function of the QSOs Observed with the Sloan Digital Sky Survey Data Release Seven (SDSS DR7)

Singh, Salam Ajitkumar; Meitei, I. Ablu; Singh, Keisham Surjit

doi:10.4236/ijaa.2014.43043

Cited by 2 publications

(2 citation statements)

References 11 publications

(16 reference statements)

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“…It consists of 105,783 spectroscopically confirmed quasars that are brighter than =-22.0, have at least one broad emission line (FWHM 1000 km s -1 ), and have highly reliable redshifts [41]. The redshift distribution for SDSS DR7 quasars is also shown in Singh et al (2014) [42]. About half of these objects were targeted by using the final quasar target selection algorithm described in [43], and form a homogeneous, statistical quasar sample.…”

Section: The Sdss Surveymentioning

confidence: 99%

Optical Luminosity Function of Quasi Stellar Objects

Singh¹

2016

AJAA

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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 ≤ ≤ 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 Ω m =0.3 and Ω Λ =0.7, we determine the best-fitting optical luminosity function model parameters.

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Section: The Sdss Surveymentioning

confidence: 99%

Optical Luminosity Function of Quasi Stellar Objects

Singh¹

2016

AJAA

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“…(2014)[39]. The catalog consists of quasars that have a luminosity larger than M i = −22.5 (calculated assuming Ʌ cosmology with 0.…”

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confidence: 99%

Schechter Function Model for the QSO Luminosity Function from the SDSS DR7

Singh¹,

Meitei²,

Singh³

2016

IJAA

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A study of the optical luminosity function of Quasi Stellar Objects (QSOs) and its evolution with redshift is carried out using the data from the Sloan Digital Sky Survey Data Release Seven (SDSS DR7). It is shown that the observed QSO luminosity function is well fitted by a Schechter function model of the form α , where i L * is the break or characteristic luminosity with luminosity evolution characterized by a second order polynomial in red shift. The best fit parameters are determined by using the Levenberg-Marquardt method of nonlinear least square fit.

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Optical Luminosity Function of the QSOs Observed with the Sloan Digital Sky Survey Data Release Seven (SDSS DR7)

Abstract: Abstract

Cited by 2 publications

References 11 publications

Optical Luminosity Function of Quasi Stellar Objects

Optical Luminosity Function of Quasi Stellar Objects

Schechter Function Model for the QSO Luminosity Function from the SDSS DR7

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