A Mature Dusty Star-forming Galaxy Hosting GRB080607 at z=3.036

Abstract

We report the discovery of the host galaxy of dark burst GRB080607 at z_GRB=3.036. GRB080607 is a unique case of a highly extinguished (A_V~3 mag) afterglow that was yet sufficiently bright for high-quality absorption-line spectroscopy. The host galaxy is clearly resolved in deep HST WF3/IR F160W images and well detected in the Spitzer IRAC 3.5 micron and 4.5 micron channels, while displaying little/no fluxes in deep optical images from Keck and Magellan. The extremely red optical-infrared colors are consistent with the large extinction seen in the afterglow light, suggesting that the large amount of dust and gas surface mass density seen along the afterglow sightline is not merely local but likely reflects the global dust content across the entire host galaxy. Adopting the dust properties and metallicity of the host ISM derived from studies of early-time afterglow light and absorption-line spectroscopy, we perform a stellar population synthesis analysis of the observed spectral energy distribution to constrain the intrinsic luminosity and stellar population of this dark burst host. The host galaxy is best described by an exponentially declining star formation rate of e-folding time tau=2 Gyr and an age of ~2 Gyr. We also derive an extinction corrected star formation rate of SFR 125 h^{-2} M_sun/yr and a total stellar mass of M_* ~ 4x10^11 h^{-2} M_sun. Our study provides an example of massive, dusty star-forming galaxies contributing to the GRB host galaxy population, supporting the notion that long-duration GRBs trace the bulk of cosmic star formation.

5 pages, 2 figures; ApJL in press; a high-resolution version is available at http://lambda.uchicago.edu/public/tmp/g080607.pdf

References in corpus (18)

• UV Star Formation Rates in the Local Universe
• Long gamma-ray bursts and core-collapse supernovae have different environments
• The Stellar, Gas and Dynamical Masses of Star-Forming Galaxies at z~2
• Evolution of asymptotic giant branch stars I. Updated synthetic TP-AGB models and their basic calibration
• The Galaxy Population Hosting Gamma-Ray Bursts
• Measured Metallicities at the Sites of Nearby Broad-Lined Type Ic Supernovae and Implications for the SN-GRB Connection
• UV star-formation rates of GRB host galaxies
• Swift Identification of Dark Gamma-Ray Bursts
• The Host Galaxies of Swift Dark Gamma-Ray Bursts: Observational Constraints on Highly Obscured and Very High-Redshift GRBs
• The First Positive Detection of Molecular Gas in a GRB Host Galaxy
• Abundances and Behavior of 12CO, 13CO, and C2 in Translucent Sight Lines
• GRBs as Cosmological Probes - Cosmic Chemical Evolution
• Reconciling the Metallicity Distributions of Gamma-ray Burst, Damped Lyman-alpha, and Lyman-break Galaxies at z=3
• On the Nature of Velocity Fields in High z Galaxies
• The metallicity dependence of the long-duration GRB rate from host galaxy luminosities
• High-Redshift Starbursting Dwarf Galaxies Revealed by GRB Afterglows
• The SCUBA HAlf Degree Extragalactic Survey (SHADES) - VII. Optical/IR photometry and stellar masses of sub-millimeter galaxies
• The SCUBA Half Degree Extragalactic Survey (SHADES) - IX: the environment, mass and redshift dependence of star formation

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