The discovery of a typical radio galaxy at z = 4.88
In this letter we report the discovery of a z=4.88 radio galaxy discovered with a new technique which does not rely on pre-selection of a sample based on radio properties such as steep-spectral index or small angular size. This radio galaxy was discovered in the Elais-N2 field and has a spectral ind...
| Huvudupphovsmän: | , , , , , |
|---|---|
| Materialtyp: | Journal article |
| Publicerad: |
2009
|
| _version_ | 1826262712815976448 |
|---|---|
| author | Jarvis, M Teimourian, H Simpson, C Smith, D Rawlings, S Bonfield, D |
| author_facet | Jarvis, M Teimourian, H Simpson, C Smith, D Rawlings, S Bonfield, D |
| author_sort | Jarvis, M |
| collection | OXFORD |
| description | In this letter we report the discovery of a z=4.88 radio galaxy discovered with a new technique which does not rely on pre-selection of a sample based on radio properties such as steep-spectral index or small angular size. This radio galaxy was discovered in the Elais-N2 field and has a spectral index of alpha = 0.75, i.e. not ultra-steep spectrum. It also has a luminosity consistent with being drawn from the break of the radio luminosity function and can therefore be considered as a typical radio galaxy. Using the Spitzer-SWIRE data over this field we find that the host galaxy is consistent with being similarly massive to the lower redshift powerful radio galaxies (~1-3L*). We note however, that at z=4.88 the H-alpha line is redshifted into the IRAC 3.6micron filter and some of the flux in this band may be due to this rather than stellar continuum emission. The discovery of such a distant radio source from our initial spectroscopic observations demonstrate the promise of our survey for finding the most distant radio sources. |
| first_indexed | 2024-03-06T19:40:25Z |
| format | Journal article |
| id | oxford-uuid:2079a44f-9285-406b-a2a9-903d2fface11 |
| institution | University of Oxford |
| last_indexed | 2024-03-06T19:40:25Z |
| publishDate | 2009 |
| record_format | dspace |
| spelling | oxford-uuid:2079a44f-9285-406b-a2a9-903d2fface112022-03-26T11:27:53ZThe discovery of a typical radio galaxy at z = 4.88Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:2079a44f-9285-406b-a2a9-903d2fface11Symplectic Elements at Oxford2009Jarvis, MTeimourian, HSimpson, CSmith, DRawlings, SBonfield, DIn this letter we report the discovery of a z=4.88 radio galaxy discovered with a new technique which does not rely on pre-selection of a sample based on radio properties such as steep-spectral index or small angular size. This radio galaxy was discovered in the Elais-N2 field and has a spectral index of alpha = 0.75, i.e. not ultra-steep spectrum. It also has a luminosity consistent with being drawn from the break of the radio luminosity function and can therefore be considered as a typical radio galaxy. Using the Spitzer-SWIRE data over this field we find that the host galaxy is consistent with being similarly massive to the lower redshift powerful radio galaxies (~1-3L*). We note however, that at z=4.88 the H-alpha line is redshifted into the IRAC 3.6micron filter and some of the flux in this band may be due to this rather than stellar continuum emission. The discovery of such a distant radio source from our initial spectroscopic observations demonstrate the promise of our survey for finding the most distant radio sources. |
| spellingShingle | Jarvis, M Teimourian, H Simpson, C Smith, D Rawlings, S Bonfield, D The discovery of a typical radio galaxy at z = 4.88 |
| title | The discovery of a typical radio galaxy at z = 4.88 |
| title_full | The discovery of a typical radio galaxy at z = 4.88 |
| title_fullStr | The discovery of a typical radio galaxy at z = 4.88 |
| title_full_unstemmed | The discovery of a typical radio galaxy at z = 4.88 |
| title_short | The discovery of a typical radio galaxy at z = 4.88 |
| title_sort | discovery of a typical radio galaxy at z 4 88 |
| work_keys_str_mv | AT jarvism thediscoveryofatypicalradiogalaxyatz488 AT teimourianh thediscoveryofatypicalradiogalaxyatz488 AT simpsonc thediscoveryofatypicalradiogalaxyatz488 AT smithd thediscoveryofatypicalradiogalaxyatz488 AT rawlingss thediscoveryofatypicalradiogalaxyatz488 AT bonfieldd thediscoveryofatypicalradiogalaxyatz488 AT jarvism discoveryofatypicalradiogalaxyatz488 AT teimourianh discoveryofatypicalradiogalaxyatz488 AT simpsonc discoveryofatypicalradiogalaxyatz488 AT smithd discoveryofatypicalradiogalaxyatz488 AT rawlingss discoveryofatypicalradiogalaxyatz488 AT bonfieldd discoveryofatypicalradiogalaxyatz488 |