No evidence for an Eddington-ratio dependence of X-ray weakness in
  BALQSOs
  Several works have studied the relation between X-ray, UV, and wind
properties in broad absorption line quasars (BALQSOs), generally concluding
that the formation of strong winds is tightly connected with the suppression of
the ionizing EUV/X-ray emission. The Eddington ratio ($\lambda_{Edd}$), which
measures the accretion rate, is also known to be related with outflow and
emission-line properties in the general quasar population. Moreover, models
describing quasar accretion depend on $\lambda_{Edd}$, which can thus possibly
affect the relative production of accelerating UV and ionizing EUV/X-ray
radiation. In this work, for the first time, we investigated whether BALQSO
X-ray properties are related with the Eddington ratio. We selected a sample of
30 BALQSOs with accurate measurements of black-hole mass and BAL properties
from the literature, and we complemented it with 4 additional BALQSOs we
observed with \xmm\, to populate the low and high Eddington-ratio regimes. We
did not find evidence for a strong relation between $\lambda_{Edd}$ and X-ray
suppression, which however shows a significant correlation with the strength of
the UV absorption features. These findings are confirmed also by considering a
sample of mini-BALQSOs collected from the literature.
