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Article Dans Une Revue Astronomy and Astrophysics - A&A Année : 2021

Fast radio burst repeaters produced via Kozai-Lidov feeding of neutron stars in binary systems

Résumé

Neutron stars are likely surrounded by gas, debris, and asteroid belts. Kozai-Lidov perturbations, induced by a distant, but gravitationally bound companion, can trigger the infall of such orbiting bodies onto a central compact object. These effects could lead to the emission of fast radio bursts (FRBs), for example by asteroid-induced magnetic wake fields in the wind of the compact object. A few percent of binary neutron star systems in the Universe, such as neutron star-main sequence star, neutron star-white dwarf, double neutron star, and neutron star-black hole systems, can account for the observed non-repeating FRB rates. More remarkably, we find that wide and close companion orbits lead to non-repeating and repeating sources, respectively, and they allow for one to compute a ratio between repeating and non-repeating sources of a few percent, which is in close agreement with the observations. Three major predictions can be made from our scenario, which can be tested in the coming years: (1) most repeaters should stop repeating after a period between 10 years to a few decades, as their asteroid belts become depleted; (2) some non-repeaters could occasionally repeat, if we hit the short period tail of the FRB period distribution; and (3) series of sub-Jansky level short radio bursts could be observed as electromagnetic counterparts of the mergers of binary neutron star systems.
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Dates et versions

hal-03119174 , version 1 (22-01-2021)

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V. Decoene, K. Kotera, J. Silk. Fast radio burst repeaters produced via Kozai-Lidov feeding of neutron stars in binary systems. Astronomy and Astrophysics - A&A, 2021, 645, pp.A122. ⟨10.1051/0004-6361/202038975⟩. ⟨hal-03119174⟩
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