A Connection between Obscuration and Star Formation in Luminous Quasars
  We present a measurement of the star formation properties of a uniform sample
of mid-IR selected, unobscured and obscured quasars (QSO1s and QSO2s) in the
Bo\"otes survey region. We use an spectral energy distribution (SED) analysis
for photometric data spanning optical to far-IR wavelengths to decompose AGN
and host galaxy components. We find that when compared to a matched sample of
QSO1s, the QSO2s have higher far-IR detection fractions, far-IR fluxes and
infrared star formation luminosities ($L_{\rm IR}^{\rm SF}$) by a factor of
$\sim2$. Correspondingly, we show that the AGN obscured fraction rises from 0.3
to 0.7 between $4-40\times10^{11}L_\odot$. We also find evidence associating
the absorption in the X-ray emission with the presence of far-IR emitting dust.
Overall, these results are consistent with galaxy evolution models in which
quasar obscurations can be associated with a dust-enshrouded starburst
galaxies.
