THE INFRARED PROPERTIES OF SOURCES MATCHED IN THE WISE ALL-SKY AND HERSCHEL ATLAS SURVEYS
We describe the infrared properties of sources detected over 36deg 2 of sky in the GAMA 15 hr equatorial field, using data from both the Herschel Astrophysical Terahertz Large-Area Survey (H-ATLAS) and Wide-field Infrared Survey (WISE). With 5σ point-source depths of 34 and 0.048mJy at 250 μm and 3....
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
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2012
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| _version_ | 1826300144890413056 |
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| author | Bond, N Benford, D Gardner, J Amblard, A Fleuren, S Blain, A Dunne, L Smith, D Maddox, S Hoyos, C Baes, M Bonfield, D Bourne, N Bridge, C Buttiglione, S Cava, A Clements, D Cooray, A Dariush, A de Zotti, G Driver, S Dye, S Eales, S Eisenhardt, P Hopwood, R |
| author_facet | Bond, N Benford, D Gardner, J Amblard, A Fleuren, S Blain, A Dunne, L Smith, D Maddox, S Hoyos, C Baes, M Bonfield, D Bourne, N Bridge, C Buttiglione, S Cava, A Clements, D Cooray, A Dariush, A de Zotti, G Driver, S Dye, S Eales, S Eisenhardt, P Hopwood, R |
| author_sort | Bond, N |
| collection | OXFORD |
| description | We describe the infrared properties of sources detected over 36deg 2 of sky in the GAMA 15 hr equatorial field, using data from both the Herschel Astrophysical Terahertz Large-Area Survey (H-ATLAS) and Wide-field Infrared Survey (WISE). With 5σ point-source depths of 34 and 0.048mJy at 250 μm and 3.4 μm, respectively, we are able to identify 50.6% of the H-ATLAS sources in the WISE survey, corresponding to a surface density of 630deg-2. Approximately two-thirds of these sources have measured spectroscopic or optical/near-IR photometric redshifts of z < 1. For sources with spectroscopic redshifts at z < 0.3, we find a linear correlation between the infrared luminosity at 3.4 μm and that at 250 μm, with ±50% scatter over 1.5 orders of magnitude in luminosity, 109-10 10.5 L. By contrast, the matched sources without previously measured redshifts (r ≳ 20.5) have 250-350 μm flux density ratios which suggest either high-redshift galaxies (z ≳ 1.5) or optically faint low-redshift galaxies with unusually low temperatures (T ≲ 20). Their small 3.4-250 μm flux ratios favor a high-redshift galaxy population, as only the most actively star-forming galaxies at low redshift (e.g., Arp 220) exhibit comparable flux density ratios. Furthermore, we find a relatively large active galactic nucleus fraction (30%) in a 12 μm flux-limited subsample of H-ATLAS sources, also consistent with there being a significant population of high-redshift sources in the no-redshift sample. © © 2012. The American Astronomical Society. All rights reserved. |
| first_indexed | 2024-03-07T05:12:42Z |
| format | Journal article |
| id | oxford-uuid:dc1b4ce4-dafe-44a4-9c91-bb2c00e9ec38 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T05:12:42Z |
| publishDate | 2012 |
| record_format | dspace |
| spelling | oxford-uuid:dc1b4ce4-dafe-44a4-9c91-bb2c00e9ec382022-03-27T09:15:29ZTHE INFRARED PROPERTIES OF SOURCES MATCHED IN THE WISE ALL-SKY AND HERSCHEL ATLAS SURVEYSJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:dc1b4ce4-dafe-44a4-9c91-bb2c00e9ec38EnglishSymplectic Elements at Oxford2012Bond, NBenford, DGardner, JAmblard, AFleuren, SBlain, ADunne, LSmith, DMaddox, SHoyos, CBaes, MBonfield, DBourne, NBridge, CButtiglione, SCava, AClements, DCooray, ADariush, Ade Zotti, GDriver, SDye, SEales, SEisenhardt, PHopwood, RWe describe the infrared properties of sources detected over 36deg 2 of sky in the GAMA 15 hr equatorial field, using data from both the Herschel Astrophysical Terahertz Large-Area Survey (H-ATLAS) and Wide-field Infrared Survey (WISE). With 5σ point-source depths of 34 and 0.048mJy at 250 μm and 3.4 μm, respectively, we are able to identify 50.6% of the H-ATLAS sources in the WISE survey, corresponding to a surface density of 630deg-2. Approximately two-thirds of these sources have measured spectroscopic or optical/near-IR photometric redshifts of z < 1. For sources with spectroscopic redshifts at z < 0.3, we find a linear correlation between the infrared luminosity at 3.4 μm and that at 250 μm, with ±50% scatter over 1.5 orders of magnitude in luminosity, 109-10 10.5 L. By contrast, the matched sources without previously measured redshifts (r ≳ 20.5) have 250-350 μm flux density ratios which suggest either high-redshift galaxies (z ≳ 1.5) or optically faint low-redshift galaxies with unusually low temperatures (T ≲ 20). Their small 3.4-250 μm flux ratios favor a high-redshift galaxy population, as only the most actively star-forming galaxies at low redshift (e.g., Arp 220) exhibit comparable flux density ratios. Furthermore, we find a relatively large active galactic nucleus fraction (30%) in a 12 μm flux-limited subsample of H-ATLAS sources, also consistent with there being a significant population of high-redshift sources in the no-redshift sample. © © 2012. The American Astronomical Society. All rights reserved. |
| spellingShingle | Bond, N Benford, D Gardner, J Amblard, A Fleuren, S Blain, A Dunne, L Smith, D Maddox, S Hoyos, C Baes, M Bonfield, D Bourne, N Bridge, C Buttiglione, S Cava, A Clements, D Cooray, A Dariush, A de Zotti, G Driver, S Dye, S Eales, S Eisenhardt, P Hopwood, R THE INFRARED PROPERTIES OF SOURCES MATCHED IN THE WISE ALL-SKY AND HERSCHEL ATLAS SURVEYS |
| title | THE INFRARED PROPERTIES OF SOURCES MATCHED IN THE WISE ALL-SKY AND HERSCHEL ATLAS SURVEYS |
| title_full | THE INFRARED PROPERTIES OF SOURCES MATCHED IN THE WISE ALL-SKY AND HERSCHEL ATLAS SURVEYS |
| title_fullStr | THE INFRARED PROPERTIES OF SOURCES MATCHED IN THE WISE ALL-SKY AND HERSCHEL ATLAS SURVEYS |
| title_full_unstemmed | THE INFRARED PROPERTIES OF SOURCES MATCHED IN THE WISE ALL-SKY AND HERSCHEL ATLAS SURVEYS |
| title_short | THE INFRARED PROPERTIES OF SOURCES MATCHED IN THE WISE ALL-SKY AND HERSCHEL ATLAS SURVEYS |
| title_sort | infrared properties of sources matched in the wise all sky and herschel atlas surveys |
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