Abstract
We report on a study of the galaxy environments of low redshift physical
quasars pairs. We selected 20 pairs having projected separation $<$ 0.5 Mpc and
difference of systemic velocity $<$ 800 km s$^-1$. Using SDSS images we
evaluated the galaxy overdensity around these quasars in pairs and then compare
it with that of a sample of isolated quasars with same redshift and luminosity.
It is found that on average there is a systematic larger overdensity of
galaxies around quasars in pairs with respect to that of isolated quasars. This
may represent a significant link between nuclear activity and galaxy
environment. However, at odds with that, the closest quasar pairs seem to
inhabit poorer environments. Implications of present results and perspectives
for future work are briefly discussed.
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