Strong NIR emission following the long duration GRB 211211A: Dust heating as an alternative to a kilonova

Abstract

The prolonged near infrared (NIR) emission observed following the long duration GRB 211211A is inconsistent with afterglow emission from the shock driven into the circum-stellar medium (CSM), and with emission from a possible underlying supernova. It has therefore been suggested that the observed NIR flux is the signature of a kilonova -- a radioactive ejecta that is similar to the outcome of the binary neutron star merger GW170817. We propose here an alternative plausible explanation. We show that the NIR flux is consistent with thermal emission from dust, heated by UV and soft X-ray radiation produced by the interaction of the GRB jet plasma with the CSM. This NIR emission was predicted by Waxman & Draine for GRBs residing near or withing massive molecular clouds. The dust NIR emission scenario is consistent with a GRB at $z\lesssim 1$. Inspection of the environment of GRB 211211A suggests that there are at least two host-galaxy candidates, one at $z=0.076$ and the other at $z=0.459$. The $z=0.459$ possibility is also consistent with the non-detection of a supernova signature in the light curve of the GRB afterglow, and with a typical GRB $\gamma$-ray energy for the fluence of GRB 211211A.

arXiv commentAccepted to ApJ. Expanded discussion (and a table summary) of observed GRB & afterglow properties, enhancing the support for the dust interpretation

References in corpus (37)

• The Sloan Digital Sky Survey: Technical Summary
• GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
• The Global Schmidt Law in Star Forming Galaxies
• On the Absorption of X-rays in the Interstellar Medium
• Overview of the DESI Legacy Imaging Surveys
• The Physics of Gamma-Ray Bursts
• Gamma-Ray Bursts
• Jets in GRBs
• The Dynamics and Light Curves of Beamed Gamma Ray Burst Afterglows
• Observation of contemporaneous optical radiation from a gamma-ray burst
• Effect of a High Opacity on the Light Curves of Radioactively Powered Transients from Compact Object Mergers
• No supernovae associated with two long-duration gamma ray bursts
• An enigmatic long-lasting gamma-ray burst not accompanied by a bright supernova
• The gamma-ray burst GRB060614 requires a novel explosive process
• A Kilonova Following a Long-Duration Gamma-Ray Burst at 350 Mpc
• The Afterglows of Swift-era Gamma-Ray Bursts. I. Comparing pre-Swift and Swift era Long/Soft (Type II) GRB Optical Afterglows
• Light Curves of GRB Optical Flashes
• Dust sublimation by GRBs and its implications
• A nearby long gamma-ray burst from a merger of compact objects
• A long-duration gamma-ray burst with a peculiar origin
• Electromagnetic Signatures of Neutron Star Mergers in the Advanced LIGO Era
• The Afterglow of GRB 130427A from 1 to 10^16 GHz
• A Comprehensive Analysis of Swift/XRT Data: III. Jet Break Candidates in X-ray and Optical Afterglow Lightcurves
• Evidence for chromatic X-ray light-curve breaks in Swift GRB afterglows and their theoretical implications
• Constraints on the ejecta of the GW170817 neutron-star merger from its electromagnetic emission
• X-ray Destruction of Dust Along the Line of Sight to Gamma-Ray Bursts
• On the energy of gamma-ray bursts
• The Offset and Host Light Distributions of Long Gamma-Ray Bursts: A New View from HST Observations of Swift Bursts
• GRB 060505: A possible short-duration gamma-ray burst in a star forming region at redshift of 0.09
• Dust extinction for an unbiased sample of GRB afterglows
• The case for a minute-long merger-driven gamma-ray burst from fast-cooling synchrotron emission
• 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 $z>1$
• Towards a Model for the Progenitors of Gamma-Ray Bursts
• Gamma-ray bursts and collisionless shocks
• Evidence for Dust Destruction from the Early-time Colour Change of GRB 120119A
• Dust reddening and extinction curves towards gamma-ray bursts at z > 4
• The energy budget of GRBs based on updated prompt \& afterglow observations

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