BEXCO - Room F(201/202/203/204)
[NU137] High-energy neutrinos from millisecond magnetars formed from the merger of binary neutron stars
A stable fast-spinning magnetar may be born from the coalescence of binary neutron stars. Unlike a neutron star formed from the core-collapse of a massive star, the magnetar is surrounded by a rather small quantity of mass ejected during the merger, and a large radiation field from the deposition of the magnetic spin-down. The pulsar magnetosphere provides promising sites for particle acceleration, and may accelerate ions to ultrahigh energies. The accelerated particles interact with the strong radiation field and have the potential for creating a bright neutrino transient that would be useful for locating the gravitational wave source. We study the interaction processes, taking into account for the first time the impact of the evolution of the non-thermal and thermal photon fields. Our results report the expected signatures of such an transient event, including the characteristic light curves of high-energy neutrinos and X-rays from the surrounding nebula.