The relation between AGN type and host galaxy properties
  We use 3,213 Active Galactic Nuclei (AGNs) from the $\it{XMM}$-XXL northern
field to investigate the relation of AGN type with host galaxy properties.
Applying a Bayesian method, we derive the hardness ratios (HRs) and through
these the hydrogen column density ($\rm N_H$) for each source. We consider as
absorbed sources (type-2) those with $\rm N_H > 10^{21.5}\, \rm{cm^{-2}}$. We
examine the star formation rate (SFR) as well the stellar mass (M$_*$)
distributions for both absorbed and unabsorbed sources. Our work indicates that
there is no significant link between the AGN type and these host galaxy
properties. Next, we investigate whether the AGN power, as represented by its
X-ray luminosity, $\rm L_X$, correlates with any deviation of the host galaxy's
place from the so-called Main Sequence of galaxies, and we examine this
separately for the obscured and the unobscured AGN populations. To take into
account the effect of M$_*$ and redshift on SFR, we use the normalised SFR
(SFR$_{norm}$). We find that the correlation between $\rm L_X$ and
SFR$_{norm}$, follows approximately the same trend for both absorbed and
unabsorbed sources, a result that favours the standard AGN unification models.
Finally, we explore the connection between the obscuration, $\rm N_H$, and the
SFR. We find that there is no relation between these, suggesting that the
obscuration is not related to the large scale SFR in the galaxy.
