Luminosity Dependence of the Quasar Clustering from SDSS DR5

TL;DR

This study investigates how quasar clustering varies with luminosity using SDSS DR5 data, finding a weak but consistent trend that brighter quasars tend to cluster more strongly, aligning with previous studies and theoretical models.

Contribution

It provides a detailed analysis of luminosity dependence in quasar clustering using two different techniques on a large SDSS dataset, confirming weak luminosity dependence.

Findings

Brighter quasars are more clustered.

The luminosity dependence is weak.

Results agree with previous studies and models.

Abstract

43024 objects, which were primarily identified as quasars in SDSS DR5 and have spectroscopic redshifts were used to study the luminosity dependence of the quasar clustering with the help of two different techniques. The obtained results reveal that brighter quasars are more clustered, but this dependence is weak, which is in agreement with the results by Porciani & Norberg, 2006 and theoretical predictions by Lidz et al., 2006.