A Radio-selected Population of Dark, Long Gamma-ray Bursts: Comparison to the Long Gamma-ray Burst Population and Implications for Host Dust Distributions

Abstract

We present cm-band and mm-band afterglow observations of five long-duration $\gamma$-ray bursts (GRBs; GRB 130131A, 130420B, 130609A, 131229A, 140713A) with dust-obscured optical afterglow emission, known as "dark" GRBs. We detect the radio afterglow of two of the dark GRBs (GRB 130131A and 140713A), along with a tentative detection of a third (GRB 131229A) with the Karl G. Jansky Very Large Array (VLA). Supplemented by three additional VLA-detected dark GRBs from the literature, we present uniform modeling of their broadband afterglows. We derive high line-of-sight dust extinctions of $A_{V,\mathrm{GRB}}\gtrsim 2.2-10.6\mathrm{mag}$. Additionally, we model the host galaxies of the six bursts in our sample, and derive host galaxy dust extinctions of $A_{V,\mathrm{Host}}\approx 0.3-4.7\mathrm{mag}$. Across all tested $\gamma$-ray (fluence and duration) and afterglow properties (energy scales, geometries and circumburst densities), we find dark GRBs to be representative of more typical unobscured long GRBs, except in fluence, for which observational biases and inconsistent classification may influence the dark GRB distribution. Additionally, we find that $A_{V,\mathrm{GRB}}$ is not related to a uniform distribution of dust throughout the host, nor to the extremely local environment of the burst, indicating that a larger scale patchy dust distribution is the cause of the high line-of-sight extinction. Since radio observations are invaluable to revealing heavily dust-obscured GRBs, we make predictions for the detection of radio emission from host star formation with the next generation VLA.

40 pages, 15 figures, submitted to ApJ

References in corpus (36)

• The NumPy array: a structure for efficient numerical computation
• The propagation of uncertainties in stellar population synthesis modeling I: The relevance of uncertain aspects of stellar evolution and the IMF to the derived physical properties of galaxies
• The Supernova -- Gamma-Ray Burst Connection
• K-corrections and filter transformations in the ultraviolet, optical, and near infrared
• The WFCAM Science Archive
• The Galaxy Population Hosting Gamma-Ray Bursts
• UV star-formation rates of GRB host galaxies
• The Dust Attenuation Law in Galaxies
• Klein-Nishina Effects on Optically Thin Synchrotron and Synchrotron Self-Compton Spectrum
• Swift Identification of Dark Gamma-Ray Bursts
• The First Positive Detection of Molecular Gas in a GRB Host Galaxy
• Correlations of Prompt and Afterglow Emission in Swift Long and Short Gamma Ray Bursts
• Are LGRBs biased tracers of star formation? Clues from the host galaxies of the $Swift$/BAT6 complete sample of bright LGRBs III: Stellar masses, star formation rates and metallicities at $z>1$
• The dust-to-stellar mass ratio as a valuable tool to probe the evolution of local and distant star forming galaxies
• A Reverse Shock in GRB 160509A
• Connecting the progenitors, pre-explosion variability, and giant outbursts of luminous blue variables with Gaia16cfr
• The optically unbiased GRB host (TOUGH) survey. V. VLT/X-shooter emission-line redshifts for Swift GRBs at z~2
• The dark nature of GRB 051022 and its host galaxy
• X-ray Flares in Early GRB Afterglows
• Dust in the wind: the role of recent mass loss in long gamma-ray bursts
• Late-Time Radio and Millimeter Observations of Superluminous Supernovae and Long Gamma Ray Bursts: Implications for Obscured Star Formation, Central Engines, and Fast Radio Bursts
• The Arcminute Microkelvin Imager Catalogue of Gamma-ray Burst afterglows at 15.7 GHz
• A detailed study of the optical attenuation of gamma-ray bursts in the Swift era
• Probing dust-obscured star formation in the most massive Gamma-Ray Burst host galaxies
• Herschel observations of gamma-ray burst host galaxies: implications for the topology of the dusty interstellar medium
• The First Short GRB Millimeter Afterglow: The Wide-Angled Jet of the Extremely Energetic SGRB 211106A
• Deep Hubble Space Telescope Observations of GW170817: Complete Light Curves and the Properties of the Galaxy Merger of NGC 4993
• The late-time radio behavior of GRB afterglows: testing the standard model
• The distant, galaxy cluster environment of the short GRB 161104A at $z\sim 0.8$ and a comparison to the short GRB host population
• Late-Time VLA Reobservations Rule Out ULIRG-Like Host Galaxies For Most Pre-Swift Long-Duration Gamma-Ray Bursts
• Detailed Afterglow Modeling and Host Galaxy Properties of the Dark GRB 111215A
• Chandra and Hubble Space Telescope observations of dark gamma-ray bursts and their host galaxies
• Detailed multi-wavelength modelling of the dark GRB 140713A and its host galaxy
• The dark nature of GRB 130528A and its host galaxy
• New radio constraints on the obscured star formation rates of massive GRB hosts at redshifts 2-3.5
• Are there radio-loud and radio-quiet Gamma-Ray Bursts?