Do Quasars Lens Quasars?

Details Do Quasars Lens Quasars? Do Quasars Lens Quasars?

1996-12-09

arxiv.org/abs/astro-ph/9612077v1

Astronomy and Astrophysics

Astrophysics

6 pages, aas style, ams symbols, ApJL (accepted)

Scientific paper

10.1086/310505

If the unexpectedly high frequency of quasar pairs with very different component redshifts is due to the lensing of a population of background quasars by the foreground quasar, typical lens masses must be $\sim10^{12}M_{\sun}$ and the sum of all such quasar lenses would have to contain $\sim0.005$ times the closure density of the Universe. It then seems plausible that a very high fraction of all $\sim10^{12} M_{\sun}$ gravitational lenses with redshifts $z\sim1$ contain quasars. Here I propose that these systems have evolved to form the present population of massive galaxies with M$_{\rm B}\leq-22$ and $M >5\times10^{11} M_{\sun}$.

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