Radio observations of the hubble deep field-south region. IV. Optical properties of the faint radio population
The Australia Telescope Hubble Deep Field–South (ATHDF-S) survey of the Hubble Deep Field–South (HDF-S) reaches sensitivities of ~10 µJy at 1.4, 2.5, 5.2, and 8.7 GHz, making the ATHDF-S one of the deepest surveys ever performed with the Australia Telescope Compact Array (ATCA). Here, we present the...
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| Format: | Journal Article |
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Institute of Physics Publishing, Inc
2008
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| Online Access: | http://iopscience.iop.org/1538-3881/135/6/2470/pdf/1538-3881_135_6_2470.pdf http://hdl.handle.net/20.500.11937/11885 |
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| author | Huynh, M. Jackson, Carole Norris, R. Fernandez-Soto, A. |
| author_facet | Huynh, M. Jackson, Carole Norris, R. Fernandez-Soto, A. |
| author_sort | Huynh, M. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The Australia Telescope Hubble Deep Field–South (ATHDF-S) survey of the Hubble Deep Field–South (HDF-S) reaches sensitivities of ~10 µJy at 1.4, 2.5, 5.2, and 8.7 GHz, making the ATHDF-S one of the deepest surveys ever performed with the Australia Telescope Compact Array (ATCA). Here, we present the optical identifications of the ATHDF-S radio sources using data from the literature. We find that ~66% of the radio sources have optical counterparts to I = 23.5 mag. Deep Hubble Space Telescope (HST) imaging of the area identifies a further 12% of radio sources. We present new spectroscopic observations for 98 of the radio sources and supplement these spectroscopic redshifts with photometric ones calculated from five-band optical imaging. The host galaxy colors and radio-to-optical ratios indicate that low-luminosity (or “radio-quiet”) active galactic nucleimake up a significantproportion of the sub-mJy radio population, a resultwhich is in accordance with a number of other deep radio studies. The radio-to-optical ratios of the bright (S1.4 GHz > 1 mJy) sources are consistent with a bimodal distribution. |
| first_indexed | 2025-11-14T06:56:52Z |
| format | Journal Article |
| id | curtin-20.500.11937-11885 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T06:56:52Z |
| publishDate | 2008 |
| publisher | Institute of Physics Publishing, Inc |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-118852017-02-28T01:32:39Z Radio observations of the hubble deep field-south region. IV. Optical properties of the faint radio population Huynh, M. Jackson, Carole Norris, R. Fernandez-Soto, A. radio continuum galaxies – surveys The Australia Telescope Hubble Deep Field–South (ATHDF-S) survey of the Hubble Deep Field–South (HDF-S) reaches sensitivities of ~10 µJy at 1.4, 2.5, 5.2, and 8.7 GHz, making the ATHDF-S one of the deepest surveys ever performed with the Australia Telescope Compact Array (ATCA). Here, we present the optical identifications of the ATHDF-S radio sources using data from the literature. We find that ~66% of the radio sources have optical counterparts to I = 23.5 mag. Deep Hubble Space Telescope (HST) imaging of the area identifies a further 12% of radio sources. We present new spectroscopic observations for 98 of the radio sources and supplement these spectroscopic redshifts with photometric ones calculated from five-band optical imaging. The host galaxy colors and radio-to-optical ratios indicate that low-luminosity (or “radio-quiet”) active galactic nucleimake up a significantproportion of the sub-mJy radio population, a resultwhich is in accordance with a number of other deep radio studies. The radio-to-optical ratios of the bright (S1.4 GHz > 1 mJy) sources are consistent with a bimodal distribution. 2008 Journal Article http://hdl.handle.net/20.500.11937/11885 http://iopscience.iop.org/1538-3881/135/6/2470/pdf/1538-3881_135_6_2470.pdf Institute of Physics Publishing, Inc restricted |
| spellingShingle | radio continuum galaxies – surveys Huynh, M. Jackson, Carole Norris, R. Fernandez-Soto, A. Radio observations of the hubble deep field-south region. IV. Optical properties of the faint radio population |
| title | Radio observations of the hubble deep field-south region. IV. Optical properties of the faint radio population |
| title_full | Radio observations of the hubble deep field-south region. IV. Optical properties of the faint radio population |
| title_fullStr | Radio observations of the hubble deep field-south region. IV. Optical properties of the faint radio population |
| title_full_unstemmed | Radio observations of the hubble deep field-south region. IV. Optical properties of the faint radio population |
| title_short | Radio observations of the hubble deep field-south region. IV. Optical properties of the faint radio population |
| title_sort | radio observations of the hubble deep field-south region. iv. optical properties of the faint radio population |
| topic | radio continuum galaxies – surveys |
| url | http://iopscience.iop.org/1538-3881/135/6/2470/pdf/1538-3881_135_6_2470.pdf http://hdl.handle.net/20.500.11937/11885 |