A study of six low redshift QSO pairs

Abstract

The dynamical properties of six SDSS quasar pairs at z < 0.8 are investigated. The pairs have proper transverse separation < 500 kpc, and velocity difference along the line of sight < 500 km/s. If they are bound systems their dynamical mass can be evaluated and compared with that of host galaxies. Evidence is found of an excess of the former mass with respect to the latter. This suggests that these quasar pairs are hosted by galaxies with massive dark halos or that they reside in a group/cluster of galaxies.

5 pages, 3 figures, MNRAS accepted

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• Spectroscopic Confirmation of two Extremely Massive Protoclusters BOSS1244 and BOSS1542 at $z=2.24$
• Simba: The average properties of the circumgalactic medium of $2\le z\le 3$ quasars are determined primarily by stellar feedback
• A Fundamental Test for Galaxy Formation Models: Matching the Lyman-$\alpha$ Absorption Profiles of Galactic Halos over Three Decades in Distance
• Caught in the Act: Discovery of a Physical Quasar Triplet
• The environment of low redshift quasar pairs
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• The environment of QSO triplets at 1 $\lesssim$ z $\lesssim$ 1.5
• Reclassification of the nearest quasar pair candidate: SDSS J15244+3032 - RXS J15244+3032