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Infrared Emission from Kilonovae: The Case of the Nearby Short Hard Burst GRB 160821B

Kasliwal, Mansi M. and Korobkin, Oleg and Lau, Ryan M. and Wollaeger, Ryan and Fryer, Christopher L. (2017) Infrared Emission from Kilonovae: The Case of the Nearby Short Hard Burst GRB 160821B. Astrophysical Journal Letters, 843 (2). Art. No. L34. ISSN 2041-8213. https://resolver.caltech.edu/CaltechAUTHORS:20170711-142054899

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Abstract

We present constraints on Ks-band emission from one of the nearest short hard gamma-ray bursts, GRB 160821B, at z = 0.16, at three epochs. We detect a red relativistic afterglow from the jetted emission in the first epoch but do not detect any excess kilonova emission in the second two epochs. We compare upper limits obtained with Keck I/MOSFIRE to multi-dimensional radiative transfer models of kilonovae, that employ composition-dependent nuclear heating and LTE opacities of heavy elements. We discuss eight models that combine toroidal dynamical ejecta and two types of wind and one model with dynamical ejecta only. We also discuss simple, empirical scaling laws of predicted emission as a function of ejecta mass and ejecta velocity. Our limits for GRB 160821B constrain the ejecta mass to be lower than 0.03 M⊙ for velocities greater than 0.1 c. At the distance sensitivity range of advanced LIGO, similar ground-based observations would be sufficiently sensitive to the full range of predicted model emission including models with only dynamical ejecta. The color evolution of these models shows that I–K color spans 7–16 mag, which suggests that even relatively shallow infrared searches for kilonovae could be as constraining as optical searches.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.3847/2041-8213/aa799dDOIArticle
http://iopscience.iop.org/article/10.3847/2041-8213/aa799d/metaPublisherArticle
https://arxiv.org/abs/1706.04647arXivDiscussion Paper
ORCID:
AuthorORCID
Kasliwal, Mansi M.0000-0002-5619-4938
Korobkin, Oleg0000-0003-4156-5342
Fryer, Christopher L.0000-0003-2624-0056
Additional Information:© 2017 The American Astronomical Society. Received 2017 May 5; revised 2017 June 13; accepted 2017 June 13; published 2017 July 12. M.M.K. thanks M. Heida, F. Fuerst, and E. S. Phinney for cooperating with the Target Of Opportunity interrupt observations at Keck I. We thank S. B. Cenko, J. Barnes, D. Kasen, R. Simcoe, D. A. Perley, S. R. Kulkarni, W. Fong, N. Lloyd-Ronning, and W. Even for valuable discussions. We thank our anonymous referee for helpful feedback. This work was supported by the GROWTH (Global Relay of Observatories Watching Transients Happen) project funded by the National Science Foundation Partnership in International Research Program under NSF PIRE grant number 1545949. Work at LANL was done under the auspices of the National Nuclear Security Administration of the U.S. Department of Energy at Los Alamos National Laboratory under Contract No. DE-AC52-06NA25396. All LANL calculations were performed on LANL Institutional Computing resources.
Group:Astronomy Department
Funders:
Funding AgencyGrant Number
NSFOISE-1545949
Department of Energy (DOE)DE-AC52-06NA25396
Subject Keywords:gamma-ray burst: individual (GRB 160821B, GRB 130603B) – gravitational waves – nuclear reactions, nucleosynthesis, abundances – stars: black holes – stars: neutron
Issue or Number:2
Record Number:CaltechAUTHORS:20170711-142054899
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20170711-142054899
Official Citation:Mansi M. Kasliwal et al 2017 ApJL 843 L34
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:78962
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:11 Jul 2017 21:46
Last Modified:03 Oct 2019 18:14

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