2021ApJ...922..158L -
Astrophys. J., 922, 158-158 (2021/December-1)
The maximum accreted mass of recycled pulsars.
LI Z., CHEN X., CHEN H.-L. and HAN Z.
Abstract (from CDS):
The maximum mass of neutron stars (NSs) is of great importance for constraining equations of state of NSs and understanding the mass gap between NSs and stellar-mass black holes. NSs in X-ray binaries increase in mass by accreting material from their companions (known as the recycling process), and the uncertainties in the accretion process make studying the NS mass at birth a challenge. In this work, we investigate the NS accreted mass while considering the effect of NS spin evolution and provide the maximum accreted mass for NSs in the recycling process. By exploring a series of binary evolution calculations, we obtain the final NS mass and the maximum accreted mass for a given birth mass of an NS and a mass transfer efficiency. Our results show that NSs can accrete relatively more material for binary systems with donor masses in the range of 1.8 ∼ 2.4 M☉, NSs accrete relatively more mass when the remnant WD mass is in the range of ∼ 0.25-0.30 M☉, and the maximum accreted mass is positively correlated with the initial NS mass. For a 1.4 M☉ NS at birth with a moderate mass transfer efficiency of 0.3, the maximum accreted mass could be 0.27 M☉. The results can be used to estimate the minimum birth mass for systems with massive NSs in observations.
Abstract Copyright:
© 2021. The American Astronomical Society. All rights reserved.
Journal keyword(s):
Binary pulsars - Pulsars - Millisecond pulsars
Simbad objects:
8
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