| 研究実績の概要 |
Binary neutron star (BNS) mergers were long predicted to be the most canonical multi-messenger events in the Universe, which was recently confirmed by the joint detection of gravitational waves GW170817 and a short gamma-ray burst (GRB). They are also potential progenitors of neutrinos, cosmic rays, as well as a new but mysterious transient --- fast radio burst (FRB). These discoveries open the era of multi-messenger astronomy, and hence a formal formulation to estimate the joint effects on detection rate, constraint and Malmquist bias from different messengers is high in demand for future observations.
This research modeled the radiative process of non-thermal messengers from BNS mergers and systematically developed a general framework to evaluate their joint detection rates, population distributions and Malmquist biases with gravitational waves based on a statistical formulation. Using the developed methods, the following topics were studied via statistical simulation: (1) detectability of radio afterglows from BNS mergers and implications for the origin of FRBs; (2) the use of Canadian Hydrogen Intensity Mapping Experiment (CHIME) to detect radio afterglows from BNS mergers and short GRBs; (3) prospects of observing very-high-energy gamma-rays from BNS mergers by the Cherenkov Telescope Array (CTA).
These results represent some major prospects of multi-messenger detectability of BNS mergers and are expected to serve as reference for future observations.
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