Bernhard, E. orcid.org/0000-0001-9227-7346, Grimmett, L.P., Mullaney, J.R. orcid.org/0000-0002-3126-6712 et al. (3 more authors) (2019) Inferring a difference in the star-forming properties of lower versus higher X-ray luminosity AGNs. Monthly Notices of the Royal Astronomical Society: Letters, 483 (1). L52-L57. ISSN 1745-3925
Abstract
We explore the distribution of RMS ≡ SFR/SFRMS (where SFRMS is the star formation rate of ‘main-sequence’ star-forming galaxies) for AGN hosts at z = 1. We split our sample into two bins of X-ray luminosity divided at LX = 2 × 1043 erg s−1 to investigate whether the RMS distribution changes as a function of AGN power. Our main results suggest that, when the RMS distribution of AGN hosts is modelled as a log-normal distribution (i.e. the same shape as that of MS galaxies), galaxies hosting more powerful X-ray AGNs (i.e. LX > 2 × 1043 erg s−1) display a narrower RMS distribution that is shifted to higher values compared to their lower LX counterparts. In addition, we find that more powerful X-ray AGNs have SFRs that are more consistent with that of MS galaxies compared to lower LX AGNs. Despite this, the mean SFRs (as opposed to RMS) measured from these distributions are consistent with the previously observed flat relationship between SFR and LX. Our results suggest that the typical star-forming properties of AGN hosts change with LX, and that more powerful AGNs typically reside in more MS-like star-forming galaxies compared to lower LX AGNs.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2018 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. This is an author produced version of a paper subsequently published in Monthly Notices of the Royal Astronomical Society: Letters. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Galaxies: active; galaxies: evolution; galaxies: statistics; X-rays: galaxies |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > Department of Physics and Astronomy (Sheffield) |
Funding Information: | Funder Grant number SCIENCE AND TECHNOLOGY FACILITIES COUNCIL ST/R000964/1 |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 11 Mar 2019 12:49 |
Last Modified: | 11 Mar 2019 12:49 |
Published Version: | https://doi.org/10.1093/mnrasl/sly217 |
Status: | Published |
Publisher: | Oxford University Press |
Refereed: | Yes |
Identification Number: | 10.1093/mnrasl/sly217 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:143432 |