Symeonidis, M;
Page, MJ;
(2018)
What powers hyperluminous infrared galaxies at z similar to 1-2?
Monthly Notices of the Royal Astronomical Society: Letters
, 479
(1)
L91-L95.
10.1093/mnrasl/sly105.
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Abstract
We investigate what powers hyperluminous infrared galaxies (HyLIRGs; LIR,8−1000μm>1013 L⊙) at z ∼ 1–2, by examining the behaviour of the infrared luminosity function of active galactic nuclei (AGN) in relation to the infrared galaxy luminosity function. The former corresponds to emission from AGN-heated dust only, whereas the latter includes emission from dust heated by stars and AGN. Our results show that the two luminosity functions are substantially different below 1013 L⊙ but converge in the HyLIRG regime. We find that the fraction of AGN-dominated sources increases with the total infrared luminosity and at LIR>1013.5L⊙ AGN can account for the entire infrared emission. We conclude that the bright end of the 1 < z < 2 infrared galaxy luminosity function is shaped by AGN rather than star-forming galaxies.
| Type: | Article |
|---|---|
| Title: | What powers hyperluminous infrared galaxies at z similar to 1-2? |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1093/mnrasl/sly105 |
| Publisher version: | https://doi.org/10.1093/mnrasl/sly105 |
| Language: | English |
| Additional information: | This is the published version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | galaxies: active, galaxies: general, galaxies: high-redshift, infrared: galaxies |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10052026 |
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