{
  "id": "2106.10678",
  "version": "v1",
  "published": "2021-06-20T11:10:57.000Z",
  "updated": "2021-06-20T11:10:57.000Z",
  "title": "The role of AGN and its obscuration on the position of the host galaxy relative to Main Sequence",
  "authors": [
    "G. Mountrichas",
    "V. Buat",
    "G. Yang",
    "M. Boquien",
    "D. Burgarella",
    "L. Ciesla",
    "K. Malek",
    "R. Shirley"
  ],
  "comment": "Accepted for publication in A&A",
  "categories": [
    "astro-ph.GA",
    "astro-ph.CO"
  ],
  "abstract": "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.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2021-06-20T11:10:57.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "main sequence",
      "host galaxy relative",
      "massive galaxies",
      "obscuration",
      "flat relation"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}