Bibcode
Sandrinelli, A.; Falomo, R.; Treves, A.; Scarpa, R.; Uslenghi, M.
Bibliographical reference
Monthly Notices of the Royal Astronomical Society, Volume 474, Issue 4, p.4925-4936
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3
2018
Citations
5
Refereed citations
4
Description
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 Sloan Digital Sky Survey 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.
Related projects
Relativistic and Theoretical Astrophysics
Introduction Gravitational lenses are a powerful tool for Astrophysics and Cosmology. The goals of this project are: i) to obtain a robust determination of the Hubble constant from the time delay measured between the images of a lensed quasar; ii) to study the individual and statistical properties of dark matter condensations in lens galaxies from
Evencio
Mediavilla Gradolph