Submillimetre photometry of typical high-redshift radio quasars
We present submillimetre (SCUBA) photometry of a sample of eight high-redshift (2.5 < z < 3.5) radio quasars from two redshift surveys: the TEXOX-1000, or TOOT, survey; and the 7C Redshift Survey (7CRS). Unlike the powerful high-redshift radio sources observed previously in the submill...
| Main Authors: | , , , , , |
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| Format: | Journal article |
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2004
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| _version_ | 1826283771592179712 |
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| author | Rawlings, S Willott, C Hill, G Archibald, E Dunlop, J Hughes, D |
| author_facet | Rawlings, S Willott, C Hill, G Archibald, E Dunlop, J Hughes, D |
| author_sort | Rawlings, S |
| collection | OXFORD |
| description | We present submillimetre (SCUBA) photometry of a sample of eight high-redshift (2.5 < z < 3.5) radio quasars from two redshift surveys: the TEXOX-1000, or TOOT, survey; and the 7C Redshift Survey (7CRS). Unlike the powerful high-redshift radio sources observed previously in the submillimetre, these radio sources are typical of those dominating the radio luminosity density of the population. We detect just two of the TOOT/7CRS targets at 850 microns, and one of these detections is probably due to synchrotron emission rather than dust. The population represented by the other six objects is detected in a statistical sense with their average 850-micron flux density implying that they are similar to low-redshift, far-infrared-luminous quasars undergoing at most moderate (< 200 solar masses per year) starbursts. By considering all the SCUBA data available for radio sources, we conclude that positive correlations between rest-frame far-infrared luminosity, 151-MHz luminosity and redshift, although likely to be present, are hard to interpret because of subtle selection and classification biases, small number statistics and uncertainties concerning synchrotron contamination and K-correction. We argue that there is not yet any compelling evidence for significant differences in the submillimetre properties of radio-loud and radio-quiet quasars at high redshift. |
| first_indexed | 2024-03-07T01:03:54Z |
| format | Journal article |
| id | oxford-uuid:8aab8d8c-9f7e-423d-8983-2c387fe2cca4 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T01:03:54Z |
| publishDate | 2004 |
| record_format | dspace |
| spelling | oxford-uuid:8aab8d8c-9f7e-423d-8983-2c387fe2cca42022-03-26T22:33:00ZSubmillimetre photometry of typical high-redshift radio quasarsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:8aab8d8c-9f7e-423d-8983-2c387fe2cca4Symplectic Elements at Oxford2004Rawlings, SWillott, CHill, GArchibald, EDunlop, JHughes, DWe present submillimetre (SCUBA) photometry of a sample of eight high-redshift (2.5 < z < 3.5) radio quasars from two redshift surveys: the TEXOX-1000, or TOOT, survey; and the 7C Redshift Survey (7CRS). Unlike the powerful high-redshift radio sources observed previously in the submillimetre, these radio sources are typical of those dominating the radio luminosity density of the population. We detect just two of the TOOT/7CRS targets at 850 microns, and one of these detections is probably due to synchrotron emission rather than dust. The population represented by the other six objects is detected in a statistical sense with their average 850-micron flux density implying that they are similar to low-redshift, far-infrared-luminous quasars undergoing at most moderate (< 200 solar masses per year) starbursts. By considering all the SCUBA data available for radio sources, we conclude that positive correlations between rest-frame far-infrared luminosity, 151-MHz luminosity and redshift, although likely to be present, are hard to interpret because of subtle selection and classification biases, small number statistics and uncertainties concerning synchrotron contamination and K-correction. We argue that there is not yet any compelling evidence for significant differences in the submillimetre properties of radio-loud and radio-quiet quasars at high redshift. |
| spellingShingle | Rawlings, S Willott, C Hill, G Archibald, E Dunlop, J Hughes, D Submillimetre photometry of typical high-redshift radio quasars |
| title | Submillimetre photometry of typical high-redshift radio quasars |
| title_full | Submillimetre photometry of typical high-redshift radio quasars |
| title_fullStr | Submillimetre photometry of typical high-redshift radio quasars |
| title_full_unstemmed | Submillimetre photometry of typical high-redshift radio quasars |
| title_short | Submillimetre photometry of typical high-redshift radio quasars |
| title_sort | submillimetre photometry of typical high redshift radio quasars |
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