Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 449, Issue 1, Pages 373-389Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stv213
Keywords
galaxies: evolution; galaxies: nuclei; infrared: galaxies
Categories
Funding
- BMVIT (Austria)
- ESA-PRODEX (Belgium)
- CEA/CNES (France)
- DLR (Germany)
- ASI/INAF (Italy)
- CICYT/MCYT (Spain)
- CSA (Canada)
- NAOC (China)
- CEA (France)
- CNES (France)
- CNRS (France)
- ASI (Italy)
- MCINN (Spain)
- SNSB (Sweden)
- STFC (UK)
- UKSA (UK)
- NASA (USA)
- Alfred P. Sloan Foundation
- National Science Foundation
- US Department of Energy Office of Science
- University of Arizona
- Brazilian Participation Group
- Brookhaven National Laboratory
- Carnegie Mellon University
- University of Florida
- French Participation Group
- German Participation Group
- Harvard University
- Instituto de Astrofisica de Canarias
- Michigan State/Notre Dame/JINA Participation Group
- Johns Hopkins University
- Lawrence Berkeley National Laboratory
- Max Planck Institute for Astrophysics
- Max Planck Institute for Extraterrestrial Physics
- New Mexico State University
- New York University
- Ohio State University
- Pennsylvania State University
- University of Portsmouth
- Princeton University
- Spanish Participation Group
- University of Tokyo
- University of Utah
- Vanderbilt University
- University of Virginia
- University of Washington
- Yale University
- NSF [AST-0607701, AST-0908246, AST-0908442, AST-0908354]
- NASA [Spitzer-1356708, 08-ADP08-0019, NNX09AC95G]
- FP7 Career Integration Grant 'eEASy' [CIG 321913]
- STFC [ST/K000977/1, ST/K001051/1, ST/I005765/1, ST/J001368/1, ST/L001314/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/L001314/1, ST/K000977/1, ST/J001368/1, ST/K001051/1, ST/I005765/1] Funding Source: researchfish
- UK Space Agency [ST/M003558/1, ST/G003874/1, ST/J004812/1] Funding Source: researchfish
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We study the relation of AGN accretion, star formation rate (SFR) and stellar mass (M-*) using a sample of approximate to 8600 star-forming galaxies up to z = 2.5 selected with Herschel imaging in the GOODS and COSMOS fields. For each of them we derive SFR and M-*, both corrected, when necessary, for emission from an active galactic nucleus (AGN), through the decomposition of their spectral energy distributions (SEDs). About 10 per cent of the sample are detected individually in Chandra observations of the fields. For the rest of the sample, we stack the X-ray maps to get average X-ray properties. After subtracting the X-ray luminosity expected from star formation and correcting for nuclear obscuration, we derive the average AGN accretion rate for both detected sources and stacks, as a function of M-*, SFR and redshift. The average accretion rate correlates with SFR and with M-*. The dependence on SFR becomes progressively more significant at z > 0.8. This may suggest that SFR is the original driver of these correlations. We find that average AGN accretion and star formation increase in a similar fashion with offset from the star-forming 'main-sequence'. Our interpretation is that accretion on to the central black hole and star formation broadly trace each other, irrespective of whether the galaxy is evolving steadily on the main-sequence or bursting.
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