The role of AGN and its obscuration on the position of the host galaxy
  relative to Main Sequence
  We use X-ray Active Galactic Nuclei (AGN) observed by the Chandra X-ray
Observatory within the 9.3 deg$^2$ Bo$\rm \ddot{o}$tes field of the NDWFS to
study whether there is a correlation between X-ray luminosity (L$_X$) and star
formation rate (SFR) of the host galaxy, at $\rm 0.5<z<2.0$, with respect to
the position of the galaxy to the main sequence (SFR$_{norm}$). About half of
the sources in the X-ray sample have spectroscopic redshifts. We also construct
a reference galaxy catalogue. For both datasets, we use photometric data from
optical to the far infrared, compiled by the HELP project and apply spectral
energy distribution (SED) fitting, using the X-CIGALE code. We exclude
quiescent sources from both the X-ray and the reference samples. We also
account for the mass completeness of our dataset, in different redshifts bins.
Our analysis highlights the importance of studying the SFR-L$_X$ relation, in a
uniform manner, taking into account the systematics and selection effects. Our
results suggest that, in less massive galaxies ($\rm log\,[M_*(M_\odot)] \sim
11$), AGN enhances the SFR of the host galaxy by $\sim 50\%$ compared to non
AGN systems. A flat relation is observed for the most massive galaxies.
SFR$_{norm}$ does not evolve with redshift. The results, although tentative,
are consistent with a scenario in which, in less massive systems, both AGN and
star formation (SF) are fed by cold gas, supplied by a merger event. In more
massive galaxies, the flat relation could be explained by a different SMBH
fuelling mechanism that is decoupled from the star formation of the host galaxy
(e.g. hot diffuse gas). Finally, we compare the host galaxy properties of X-ray
absorbed and unabsorbed sources. Our results show no difference which suggests
that X-ray absorption is not linked with the properties of the galaxy.
