HerMES: Spectral Energy Distributions of Submillimeter Galaxies at z >4
| Title: | HerMES: Spectral Energy Distributions of Submillimeter Galaxies at z >4 |
|---|---|
| Authors: | Huang, J. -S., Rigopoulou, D., Magdis, G., Rowan-Robinson, M., Dai, Y., Bock, J. J., Burgarella, D., Chapman, S., Clements, D. L., Cooray, A., Farrah, D., Glenn, J., Oliver, S., Smith, A. J., Wang, L., Page, M., Riechers, D., Roseboom, I., Symeonidis, M., Fazio, G. G., Yun, M., Webb, T. M. A., Efstathiou, A. |
| Publication Year: | 2014 |
| Collection: | Astrophysics |
| Subject Terms: | Astrophysics - Astrophysics of Galaxies, Astrophysics - Cosmology and Nongalactic Astrophysics |
| More Details: | We present a study of the infrared properties for a sample of seven spectroscopically confirmed submillimeter galaxies 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 (SED) and a composite model to fit the SEDs. The model includes a stellar emission component at $\lambda_{\rm rest} <$ 3.5$ \mu$m; a hot dust component peaking at $\lambda_{rest} \sim$ 5$\,\mu$m; and cold dust component which becomes significant for $\lambda_{\rm rest} >$ 50$\,\mu$m. Six objects in the sample are detected at 250 and 350$ \mu$m. The dust temperatures for the sources in this sample are in the range of 40$-$80 K, and their $L_{\rm FIR}$ $\sim$ 10$^{13}$ L$_{\odot}$ qualifies them as Hyper$-$Luminous Infrared Galaxies (HyperLIRGs). 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$ \mu$m detections corresponding to a rest-frame 4.5$ \mu$m luminosity of Log$_{10}$(L$_{4.5}$ / L$_{\odot}$) = 11 $\sim$ 11.5. Their L$_{\rm 4.5}$/$L_{\rm FIR}$ ratios are very similar to those of starburst dominated submillimeter galaxies at $z \sim$ 2. The $L_{\rm CO}-L_{\rm FIR}$ relation for this sample is consistent with that determined for local ULIRGs and SMGs at $z \sim$ 2. We conclude that submillimeter galaxies at $z >$ 4 are hotter and more luminous in the FIR, but otherwise very similar to those at $z \sim$ 2. None of these sources show any sign of the strong QSO phase being triggered. Comment: 49 pages, 15 figures. Submitted to ApJ |
| Document Type: | Working Paper |
| DOI: | 10.1088/0004-637X/784/1/52 |
| Access URL: | http://arxiv.org/abs/1401.6079 |
| Accession Number: | edsarx.1401.6079 |
| Database: | arXiv |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1088/0004-637X/784/1/52 Subjects: – SubjectFull: Astrophysics - Astrophysics of Galaxies Type: general – SubjectFull: Astrophysics - Cosmology and Nongalactic Astrophysics Type: general Titles: – TitleFull: HerMES: Spectral Energy Distributions of Submillimeter Galaxies at z >4 Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Huang, J. -S. – PersonEntity: Name: NameFull: Rigopoulou, D. – PersonEntity: Name: NameFull: Magdis, G. – PersonEntity: Name: NameFull: Rowan-Robinson, M. – PersonEntity: Name: NameFull: Dai, Y. – PersonEntity: Name: NameFull: Bock, J. J. – PersonEntity: Name: NameFull: Burgarella, D. – PersonEntity: Name: NameFull: Chapman, S. – PersonEntity: Name: NameFull: Clements, D. L. – PersonEntity: Name: NameFull: Cooray, A. – PersonEntity: Name: NameFull: Farrah, D. – PersonEntity: Name: NameFull: Glenn, J. – PersonEntity: Name: NameFull: Oliver, S. – PersonEntity: Name: NameFull: Smith, A. J. – PersonEntity: Name: NameFull: Wang, L. – PersonEntity: Name: NameFull: Page, M. – PersonEntity: Name: NameFull: Riechers, D. – PersonEntity: Name: NameFull: Roseboom, I. – PersonEntity: Name: NameFull: Symeonidis, M. – PersonEntity: Name: NameFull: Fazio, G. G. – PersonEntity: Name: NameFull: Yun, M. – PersonEntity: Name: NameFull: Webb, T. M. A. – PersonEntity: Name: NameFull: Efstathiou, A. IsPartOfRelationships: – BibEntity: Dates: – D: 23 M: 01 Type: published Y: 2014 |
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