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HerMES: The Rest-Frame UV Emission and A Lensing Model for the z=6.34 Luminous Dusty Starburst Galaxy HFLS3

Cooray, Asantha and Bock, J. and Bridge, C. (2014) HerMES: The Rest-Frame UV Emission and A Lensing Model for the z=6.34 Luminous Dusty Starburst Galaxy HFLS3. Astrophysical Journal, 790 (1). Art. No. 40. ISSN 0004-637X. https://resolver.caltech.edu/CaltechAUTHORS:20140818-092419872

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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 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_☉ yr^(–1), with the 95% confidence lower limit around 830 M_☉ yr^(–1). The dust and stellar masses of HFLS3 from the same spectral energy distribution (SED) models are at the level of 3 × 10^8 M_☉ and ~5 × 10^(10) M_☉, 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.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://arxiv.org/abs/1404.1378arXivDiscussion Paper
http://iopscience.iop.org/0004-637X/790/1/40PublisherArticle
http://dx.doi.org/10.1088/0004-637X/790/1/40DOIArticle
ORCID:
AuthorORCID
Cooray, Asantha0000-0002-3892-0190
Bock, J.0000-0002-5710-5212
Additional Information:© 2014 American Astronomical Society. Received 2014 April 6; accepted 2014 May 16; published 2014 July 1. Financial support for this work was provided by NASA through grant HST-GO-13045 from the Space Telescope Science Institute, which is operated by Associated Universities for Research in Astronomy, Inc., under NASA contract NAS5-26555. Additional support for A.C., W.O., J.C., J.L.W., and C.M.C. was from NSF with AST-1313319. We thank E. da Cunha for help with Magphys. Dark Cosmology Centre is funded by the Danish National Research Foundation (J.L.W. and D.W.). S.O. acknowledges support from the Science and Technology Facilities Council [grant No. ST/I000976/1]. SPIRE has been developed by a consortium of institutes led by Cardiff Univ. (UK) and including Univ. Lethbridge (Canada); NAOC (China); CEA, LAM(France); IFSI, Univ. Padua (Italy); IAC (Spain); Stockholm Observatory (Sweden); Imperial College London, RAL, UCL-MSSL, UKATC, Univ. Sussex (UK); and Caltech, JPL, NHSC, Univ. Colorado (USA). This development has been supported by national funding agencies: CSA (Canada); NAOC (China); CEA, CNES, CNRS (France); ASI (Italy);MCINN (Spain); SNSB (Sweden); STFC, UKSA (UK); and NASA (USA). The data presented in this paper will be released through the Herschel Database in Marseille HeDaM (hedam.oamp.fr/HerMES).
Funders:
Funding AgencyGrant Number
NASAHST-GO-13045
NASANAS5-26555
NSFAST-1313319
Danish National Research FoundationUNSPECIFIED
Science and Technology Facilities Council (STFC)ST/I000976/1
Canadian Space Agency (CSA)UNSPECIFIED
National Astronomical Observatories, Chinese Academy of Sciences (NAOC)UNSPECIFIED
Commissariat à l’Energie Atomique (CEA)UNSPECIFIED
Centre National d'Études Spatiales (CNES)UNSPECIFIED
Centre National de la Recherche Scientifique (CNRS)UNSPECIFIED
Agenzia Spaziale Italiana (ASI)UNSPECIFIED
Ministerio de Ciencia e Innovación (MCINN)UNSPECIFIED
Swedish National Space Board (SNSB)UNSPECIFIED
Science and Technology Facilities Council (STFC)UNSPECIFIED
United Kingdom Space Agency (UKSA)UNSPECIFIED
Subject Keywords: galaxies: high-redshift; galaxies: starburst; gravitational lensing: strong; infrared: galaxies; submillimeter: galaxies
Issue or Number:1
Record Number:CaltechAUTHORS:20140818-092419872
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20140818-092419872
Official Citation:HerMES: The Rest-frame UV Emission and a Lensing Model for the z = 6.34 Luminous Dusty Starburst Galaxy HFLS3 Asantha Cooray et al. 2014 ApJ 790 40
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:48647
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:19 Aug 2014 22:07
Last Modified:03 Mar 2020 13:01

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