TY - JOUR

T1 - Stripping of a Neutron Star in a Close Binary System in a Pair with a Black Hole

AU - Kramarev, N. I.

AU - Kuranov, A. G.

AU - Yudin, A. V.

AU - Postnov, K. A.

N1 - The work of N.I. Kramarev was supported by the \u2018\u2018BASIS\u2019\u2019 Foundation for the Development of Theoretical Physics and Mathematics (project no. 22-2-10-11-1). The work of A.G. Kuranov was performed using the equipment of the Data Storage and Processing System of the Sternberg Astronomical Institute of the Moscow State University purchased through the funds of the Program for the Development of the Moscow State University. A.V. Yudin thanks the Russian Science Foundation (grant no. 22-12-00103) for its support.

PY - 2024/5

Y1 - 2024/5

N2 - Abstract: We consider the final evolutionary stages of a neutron star–black hole pair. According to the current paradigm, such systems eventually coalesce, which in some cases is accompanied by neutron-star tidal disruption. Using analytical methods, we show that the scenario of slow (of the order of several seconds) neutron-star stripping by the black hole is also possible, depending on the system parameters (the initial masses and intrinsic angular momenta of the components, the equation of state for the neutron star). Reaching the lower mass limit (about one tenth of the solar mass), the neutron star explodes to produce a comparatively powerful electromagnetic transient. Our population calculations show that the stripping mechanism is possible in 50–90 of the cases among all coalescing neutron star–black hole pairs, depending on the model assumptions about the evolution of close binary systems (the common-envelope efficiency parameter, the supernova explosion mechanism) and the initial metallicity of the stellar population. Because of the large mass of the ejected material, the kilonova emission in this scenario has good prospects of detection.

AB - Abstract: We consider the final evolutionary stages of a neutron star–black hole pair. According to the current paradigm, such systems eventually coalesce, which in some cases is accompanied by neutron-star tidal disruption. Using analytical methods, we show that the scenario of slow (of the order of several seconds) neutron-star stripping by the black hole is also possible, depending on the system parameters (the initial masses and intrinsic angular momenta of the components, the equation of state for the neutron star). Reaching the lower mass limit (about one tenth of the solar mass), the neutron star explodes to produce a comparatively powerful electromagnetic transient. Our population calculations show that the stripping mechanism is possible in 50–90 of the cases among all coalescing neutron star–black hole pairs, depending on the model assumptions about the evolution of close binary systems (the common-envelope efficiency parameter, the supernova explosion mechanism) and the initial metallicity of the stellar population. Because of the large mass of the ejected material, the kilonova emission in this scenario has good prospects of detection.

KW - black holes

KW - close binary systems

KW - gamma-ray bursts

KW - gravitational waves

KW - kilonovae

KW - neutron stars

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85203514172&origin=inward&txGid=3b85066498f5d8a7e01c99a8c4f870b6

UR - https://www.mendeley.com/catalogue/42d95b46-9b14-3fb7-9130-6c4267632505/

U2 - 10.1134/S1063773724700166

DO - 10.1134/S1063773724700166

M3 - Article

VL - 50

SP - 302

EP - 316

JO - Astronomy Letters

JF - Astronomy Letters

SN - 1063-7737

IS - 5

ER -