Journal article
Herschel and Hubble Study of a Lensed Massive Dusty Starbursting Galaxy at z ∼ 3
The Astrophysical journal, Vol.844(1), 82
07/20/2017
DOI: 10.3847/1538-4357/aa7aa0
Abstract
We present the results of combined deep Keck/NIRC2, HST/WFC3 near-infrared, and Herschel far-infrared observations of an extremely star-forming dusty lensed galaxy identified from the Herschel Astrophysical Terahertz Large Area Survey (H-ATLAS J133542.9+300401). The galaxy is gravitationally lensed by a massive WISE-identified galaxy cluster at z ∼ 1. The lensed galaxy is spectroscopically confirmed at z = 2.685 from detection of CO (1→0) by GBT and from detection of CO (3→2) obtained with CARMA. We use the combined spectroscopic and imaging observations to construct a detailed model of the background dusty lensed submillimeter galaxy (SMG), which allows us to study the source plane properties of the target. The best-fit lens model provides magnifications of μ {sub star} = 2.10 ± 0.11 and μ {sub dust} = 2.02 ± 0.06 for the stellar and dust components, respectively. Multiband data yield a magnification-corrected star formation rate of 1900(±200) M {sub ⊙} yr{sup −1} and a stellar mass of 6.8{sub −2.7}{sup +0.9}×10{sup 11} M{sub ⊙}, consistent with a main sequence of star formation at z ∼ 2.6. The CO observations yield a molecular gas mass of 8.3(±1.0) × 10{sup 10} M {sub ⊙}, similar to the most massive star-forming galaxies, which together with the high star formation efficiency, are responsible for the intense observed star formation rates. The lensed SMG has a very short gas depletion timescale of ∼40 Myr. The high stellar mass and small gas fractions observed indicate that the lensed SMG likely has already formed most of its stellar mass and could be a progenitor of the most massive elliptical galaxies found in the local universe.
Details
- Title: Subtitle
- Herschel and Hubble Study of a Lensed Massive Dusty Starbursting Galaxy at z ∼ 3
- Creators
- H Nayyeri - University of California, IrvineA Cooray - University of California, IrvineE Jullo - Laboratoire d’Astrophysique de MarseilleD. A Riechers - Cornell UniversityT. K. D Leung - Cornell UniversityD. T Frayer - National Radio Astronomy ObservatoryM. A Gurwell - Harvard UniversityA. I Harris - University of Maryland, College ParkR. J Ivison - School of Physics and AstronomyI Oteo - European Southern ObservatoryM Negrello - Cardiff UniversityS Amber - The Open UniversityA. J Baker - Rutgers, The State University of New JerseyJ Calanog - San Diego Miramar CollegeC. M Casey - University of Texas at AustinH Dannerbauer - Consejo Superior de Investigaciones CientíficasG De Zotti - Osservatorio Astronomico di PadovaS Eales - Cardiff UniversityH Fu - University of Iowa, Physics and AstronomyM J Michalowski - University of EdinburghN Timmons - University of California, IrvineJ L Wardlow
- Resource Type
- Journal article
- Publication Details
- The Astrophysical journal, Vol.844(1), 82
- DOI
- 10.3847/1538-4357/aa7aa0
- ISSN
- 0004-637X
- eISSN
- 1538-4357
- Publisher
- Institute of Physics (IOP)
- Language
- English
- Date published
- 07/20/2017
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984200026202771
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