High-energy emissions from neutron star mergers. (arXiv:1903.06221v1 [astro-ph.HE])
<a href="http://arxiv.org/find/astro-ph/1/au:+Kimura_S/0/1/0/all/0/1">Shigeo S. Kimura</a>
In 2017, LIGO-Virgo collaborations reported detection of the first neutron
star merger event, GW170817, which is accompanied by electromagnetic
counterparts from radio to gamma rays. Although high-energy neutrinos were not
detected from this event, mergers of neutron stars are expected to produce such
high-energy particles. Relativistic jets are launched when neutron stars merge.
If the jets contain protons, they can emit high-energy neutrinos through
photomeson production. In addition, neutron star mergers produce massive and
fast ejecta, which can be a source of Galactic high-energy cosmic rays above
the knee. We briefly review what we learned from the multi-messenger event,
GW170817, and discuss prospects for multi-messenger detections and hadronic
cosmic-ray production related to the neutron star mergers.
In 2017, LIGO-Virgo collaborations reported detection of the first neutron
star merger event, GW170817, which is accompanied by electromagnetic
counterparts from radio to gamma rays. Although high-energy neutrinos were not
detected from this event, mergers of neutron stars are expected to produce such
high-energy particles. Relativistic jets are launched when neutron stars merge.
If the jets contain protons, they can emit high-energy neutrinos through
photomeson production. In addition, neutron star mergers produce massive and
fast ejecta, which can be a source of Galactic high-energy cosmic rays above
the knee. We briefly review what we learned from the multi-messenger event,
GW170817, and discuss prospects for multi-messenger detections and hadronic
cosmic-ray production related to the neutron star mergers.
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