Symeonidis, M;
Georgakakis, A;
Seymour, N;
Auld, R;
Bock, J;
Brisbin, D;
Buat, V;
... Wright, G; + view all
(2011)
Herschel/HerMES: the X-ray-infrared correlation for star-forming galaxies at z similar to 1.
Monthly Notices of the Royal Astronomical Society
, 417
(3)
pp. 2239-2252.
10.1111/j.1365-2966.2011.19405.x.
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Abstract
For the first time, we investigate the X-ray/infrared (IR) correlation for star-forming galaxies (SFGs) at z∼ 1, using SPIRE submm data from the recently launched Herschel Space Observatory and deep X-ray data from the 2-Ms Chandra Deep Field-North survey. We examine the X-ray/IR correlation in the soft X-ray (SX; 0.5–2 keV) and hard X-ray (HX; 2–10 keV) bands by comparing our z∼ 1 SPIRE-detected SFGs to equivalently IR-luminous (LIR > 1010 L⊙) samples in the local/low-redshift Universe. Our results suggest that the X-ray/IR properties of the SPIRE SFGs are on average similar to those of their local counterparts, as we find no evidence for evolution in the LSX/LIR and LHX/LIR ratios with redshift. We note, however, that at all redshifts, both LSX/LIR and LHX/LIR are strongly dependent on IR luminosity, with luminous and ultraluminous IR galaxies (LIRGs and ULIRGs; LIR > 1011 L⊙) having up to an order of magnitude lower values than normal IR galaxies (LIR < 1011 L⊙). We derive a LSX–LIR relation and confirm the applicability of an existing LHX–LIR relation for both local and distant LIRGs and ULIRGs, consistent with a scenario where X-ray luminosity is correlated with the star formation rate.
| Type: | Article |
|---|---|
| Title: | Herschel/HerMES: the X-ray-infrared correlation for star-forming galaxies at z similar to 1 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1111/j.1365-2966.2011.19405.x |
| Publisher version: | http://dx.doi.org/10.1111/j.1365-2966.2011.19405.x |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Science & Technology, Physical Sciences, Astronomy & Astrophysics, galaxies: general, galaxies: high-redshift, galaxies: starburst, infrared: galaxies, X-rays: galaxies, ACTIVE GALACTIC NUCLEI, DEEP-FIELD-NORTH, FORMATION RATE INDICATOR, EXTENDED GROTH STRIP, 2-10 KEV LUMINOSITY, STARBURST GALAXIES, FORMATION HISTORY, NUMBER COUNTS, OPTICAL-IDENTIFICATION, SPIRAL 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 Physics and Astronomy UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1330274 |
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