HerMES: SPECTRAL ENERGY DISTRIBUTIONS OF SUBMILLIMETER GALAXIES AT z > 4
We present a study of the infrared properties for a sample of seven spectroscopically confirmed submillimeter galaxies (SMGs) at z > 4.0. By combining ground-based near-infrared, Spitzer IRAC and MIPS, Herschel SPIRE, and ground-based submillimeter/millimeter photometry, we construct their sp...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
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Institute of Physics Publishing
2014
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| _version_ | 1797065680567140352 |
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| author | Huang, J Rigopoulou, D Magdis, G Rowan-Robinson, M Dai, Y Bock, J Burgarella, D Chapman, S Clements, D Cooray, A Farrah, D Glenn, J Oliver, S Smith, A Wang, L Page, M Riechers, D Roseboom, I Symeonidis, M Fazio, G Yun, M Webb, T Efstathiou, A |
| author_facet | Huang, J Rigopoulou, D Magdis, G Rowan-Robinson, M Dai, Y Bock, J Burgarella, D Chapman, S Clements, D Cooray, A Farrah, D Glenn, J Oliver, S Smith, A Wang, L Page, M Riechers, D Roseboom, I Symeonidis, M Fazio, G Yun, M Webb, T Efstathiou, A |
| author_sort | Huang, J |
| collection | OXFORD |
| description | We present a study of the infrared properties for a sample of seven spectroscopically confirmed submillimeter galaxies (SMGs) at z > 4.0. By combining ground-based near-infrared, Spitzer IRAC and MIPS, Herschel SPIRE, and ground-based submillimeter/millimeter photometry, we construct their spectral energy distributions (SEDs) and a composite model to fit the SEDs. The model includes a stellar emission component at λrest < 3.5 μm, a hot dust component peaking at λrest ∼ 5 μm, and cold dust component which becomes significant for λrest > 50 μm. Six objects in the sample are detected at 250 and 350 μm. The dust temperatures for the sources in this sample are in the range of 40-80 K, and their LFIR ∼ 1013 L⊙ qualifies them as hyper-luminous infrared galaxies. The mean FIR-radio index for this sample is around 〈q〉 = 2.2 indicating no radio excess in their radio emission. Most sources in the sample have 24 μm detections corresponding to a rest-frame 4.5 μm luminosity of Log10(L4.5/L ⊙) = 11 ∼ 11.5. Their L4.5/LFIR ratios are very similar to those of starburst-dominated SMGs at z ∼ 2. The L CO-LFIR relation for this sample is consistent with that determined for local ULIRGs and SMGs at z ∼ 2. We conclude that SMGs at z > 4 are hotter and more luminous in the FIR but otherwise very similar to those at z ∼ 2. None of these sources show any sign of the strong QSO phase being triggered. © 2014. The American Astronomical Society. All rights reserved. |
| first_indexed | 2024-03-06T21:32:02Z |
| format | Journal article |
| id | oxford-uuid:44fefae0-c935-422a-9082-96099a1719e6 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T21:32:02Z |
| publishDate | 2014 |
| publisher | Institute of Physics Publishing |
| record_format | dspace |
| spelling | oxford-uuid:44fefae0-c935-422a-9082-96099a1719e62022-03-26T15:05:14ZHerMES: SPECTRAL ENERGY DISTRIBUTIONS OF SUBMILLIMETER GALAXIES AT z > 4Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:44fefae0-c935-422a-9082-96099a1719e6EnglishSymplectic Elements at OxfordInstitute of Physics Publishing2014Huang, JRigopoulou, DMagdis, GRowan-Robinson, MDai, YBock, JBurgarella, DChapman, SClements, DCooray, AFarrah, DGlenn, JOliver, SSmith, AWang, LPage, MRiechers, DRoseboom, ISymeonidis, MFazio, GYun, MWebb, TEfstathiou, AWe present a study of the infrared properties for a sample of seven spectroscopically confirmed submillimeter galaxies (SMGs) at z > 4.0. By combining ground-based near-infrared, Spitzer IRAC and MIPS, Herschel SPIRE, and ground-based submillimeter/millimeter photometry, we construct their spectral energy distributions (SEDs) and a composite model to fit the SEDs. The model includes a stellar emission component at λrest < 3.5 μm, a hot dust component peaking at λrest ∼ 5 μm, and cold dust component which becomes significant for λrest > 50 μm. Six objects in the sample are detected at 250 and 350 μm. The dust temperatures for the sources in this sample are in the range of 40-80 K, and their LFIR ∼ 1013 L⊙ qualifies them as hyper-luminous infrared galaxies. The mean FIR-radio index for this sample is around 〈q〉 = 2.2 indicating no radio excess in their radio emission. Most sources in the sample have 24 μm detections corresponding to a rest-frame 4.5 μm luminosity of Log10(L4.5/L ⊙) = 11 ∼ 11.5. Their L4.5/LFIR ratios are very similar to those of starburst-dominated SMGs at z ∼ 2. The L CO-LFIR relation for this sample is consistent with that determined for local ULIRGs and SMGs at z ∼ 2. We conclude that SMGs at z > 4 are hotter and more luminous in the FIR but otherwise very similar to those at z ∼ 2. None of these sources show any sign of the strong QSO phase being triggered. © 2014. The American Astronomical Society. All rights reserved. |
| spellingShingle | Huang, J Rigopoulou, D Magdis, G Rowan-Robinson, M Dai, Y Bock, J Burgarella, D Chapman, S Clements, D Cooray, A Farrah, D Glenn, J Oliver, S Smith, A Wang, L Page, M Riechers, D Roseboom, I Symeonidis, M Fazio, G Yun, M Webb, T Efstathiou, A HerMES: SPECTRAL ENERGY DISTRIBUTIONS OF SUBMILLIMETER GALAXIES AT z > 4 |
| title | HerMES: SPECTRAL ENERGY DISTRIBUTIONS OF SUBMILLIMETER GALAXIES AT z > 4 |
| title_full | HerMES: SPECTRAL ENERGY DISTRIBUTIONS OF SUBMILLIMETER GALAXIES AT z > 4 |
| title_fullStr | HerMES: SPECTRAL ENERGY DISTRIBUTIONS OF SUBMILLIMETER GALAXIES AT z > 4 |
| title_full_unstemmed | HerMES: SPECTRAL ENERGY DISTRIBUTIONS OF SUBMILLIMETER GALAXIES AT z > 4 |
| title_short | HerMES: SPECTRAL ENERGY DISTRIBUTIONS OF SUBMILLIMETER GALAXIES AT z > 4 |
| title_sort | hermes spectral energy distributions of submillimeter galaxies at z gt 4 |
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