Multi-Messenger Detection and Neutrino Emission Prospects of gamma ray burst Afterglows from Binary Neutron Star Mergers
Year: 2025
Type: conference-paper
Abstract: Binary neutron star (BNS) mergers are crucial sources for multi-messenger astrophysics, linking gravitational waves (GWs), short gamma-ray bursts (sGRBs), and potentially very-high-energy (VHE) gamma-ray and neutrino emission. In this work, we focus on VHE GRB~160821B, one of the nearest known sGRBs, to investigate the prospects for joint detection by the LIGO/Virgo/KAGRA (LVK) network and the upcoming Cherenkov Telescope Array (CTA). Although GRB~160821B lies beyond the expected GW detection horizon at its actual distance, we explore hypothetical scenarios placing it within the O5 BNS horizon, employing a structured Gaussian jet model to assess how afterglow microphysical parameters strongly influence synchrotron self-Compton (SSC) detectability by CTA and the likelihood of simultaneous GW detection. Additionally, we estimate the high-energy neutrino fluxes from GRB~160821B, finding them to lie below current detection thresholds, but found that smaller luminosity distance or higher $\gamma$-ray efficiency could substantially improve their detectability. Our study delineates the parameter space favourable for joint GW–VHE observations and underscores the multi-messenger potential of nearby sGRBs.
DOI: 10.22323/1.501.0952
Authors: Tanima Mondal, S. Chakraborty, Jagdish Joshi, L. Resmi, D. Bose
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W4414437624
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