Journal article
HerMES: The rest-frame UV emission and a lensing model for the z = 6.34 luminous dusty starburst galaxy HFLS3
The Astrophysical journal, Vol.790(1), pp.1-10
07/20/2014
DOI: 10.1088/0004-637X/790/1/40
Abstract
We discuss the rest-frame ultraviolet emission from the starbursting galaxy HFLS3 at a redshift of 6.34. The galaxy was discovered in Herschel/SPIRE data due to its red color in the submillimeter wavelengths from 250 to 500 μm. Keck/NIRC2 K{sub s}-band adaptive optics imaging data showed two potential near-IR counterparts near HFLS3. Previously, the northern galaxy was taken to be in the foreground at z = 2.1, while the southern galaxy was assumed to be HFLS3's near-IR counterpart. The recently acquired Hubble/WFC3 and Advanced Camera for Surveys (ACS) imaging data show conclusively that both optically bright galaxies are in the foreground at z < 6. A new lensing model based on the Hubble imaging data and the millimeter-wave continuum emission yields a magnification factor of 2.2 ± 0.3, with a 95% confidence upper limit on the magnification of 3.5. When corrected for lensing, the instantaneous star formation rate is 1320 M{sub ☉} yr{sup –1}, with the 95% confidence lower limit around 830 M{sub ☉} yr{sup –1}. The dust and stellar masses of HFLS3 from the same spectral energy distribution (SED) models are at the level of 3 × 10{sup 8} M{sub ☉} and ∼5 × 10{sup 10} M{sub ☉}, respectively, with large systematic uncertainties on assumptions related to the SED model. With Hubble/WFC3 images, we also find diffuse near-IR emission about 0.5 arcsec (∼3 kpc) to the southwest of HFLS3 that remains undetected in the ACS imaging data. The emission has a photometric redshift consistent with either z ∼ 6 or a dusty galaxy template at z ∼ 2.
Details
- Title: Subtitle
- HerMES: The rest-frame UV emission and a lensing model for the z = 6.34 luminous dusty starburst galaxy HFLS3
- Creators
- Asantha Cooray - University of California, IrvineJae Calanog - University of California, IrvineC. M Casey - University of California, IrvineBrian Ma - University of California, IrvineW. A Osage - University of California, IrvineJulie L Wardlow - University of CopenhagenJ Bock - California Institute of TechnologyC Bridge - California Institute of TechnologyD Burgarella - Aix-Marseille UniversitéR. S Bussmann - Cornell UniversityD Clements - Imperial College LondonA Conley - University of Colorado BoulderD Farrah - Virginia TechH Fu - University of IowaR Gavazzi - Institut d'Astrophysique de ParisR. J Ivison - University of EdinburghN La Porte - Pontificia Universidad Católica de ChileB Lo Faro - Aix-Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille) UMR7326, F-13388 Marseille (France)G Magdis - University of OxfordS. J Oliver - University of Sussex
- Resource Type
- Journal article
- Publication Details
- The Astrophysical journal, Vol.790(1), pp.1-10
- DOI
- 10.1088/0004-637X/790/1/40
- ISSN
- 0004-637X
- eISSN
- 1538-4357
- Publisher
- Institute of Physics (IOP)
- Language
- English
- Date published
- 07/20/2014
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984200030602771
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