Signature of outflows in strong MgII absorbers in quasar sightlines
  We report a correlation between velocity offset (beta = v/c) of strong Mg II
absorption systems and the bolometric luminosity (L_bol) of quasars in
SDSS-DR7. We find that, beta shows a power law increase with L_bol, with a
slope (~ 1/4). We find that such a relation of beta with L_bol is expected for
outflows driven by scattering of black hole radiation by dust grains, and which
are launched from the innermost dust survival radius. Our results indicate that
a significant fraction of the strong MgII absorbers, in the range of beta =
(0--0.4) may be associated with the quasars themselves.
