Neutron star kicks plus rockets as a mechanism for forming wide low-eccentricity neutron star binaries

Abstract

Recent neutron star surface observations corroborate a long-standing theory that neutron stars may be accelerated over extended periods after their birth. We analyze how these prolonged rocket-like accelerations, combined with rapid birth kicks, impact binary orbits. We find that even a small contribution of rocket kicks combined with instantaneous natal kicks can allow binaries to reach period--eccentricity combinations unattainable in standard binary evolution models. We propose these kick + rocket combinations as a new channel to form wide low-eccentricity neutron star binaries such as Gaia NS1, as well as inducing stellar mergers months to years after a supernova to cause peculiar high-energy transients.

11 pages, 7 figures, published in ApJL

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Cited by in corpus (5)

• The Kick Velocity Distribution of Isolated Neutron Stars
• A kinematically constrained kick distribution for isolated neutron stars
• Natal kicks of compact objects
• On Neutron Star Natal Kicks in High-Mass X-Ray Binaries: Insights from Population Synthesis
• A Two-Stage Kick Scenario for the Peculiar LMXB GX 1+4