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A Millisecond Pulsar Progenitor to an Ultra-Compact Low-Mass X-ray Binary

Published online by Cambridge University Press:  12 April 2016

S. C. Lundgren ,
E. Ergma  and
J. M. Cordes
S. C. Lundgren
Affiliation:
Naval Research Lab, Code 7210, Washington, DC 20375
E. Ergma
Affiliation:
Physics Dept., Tartu Univ., Ylikooli 18, EE2400 Tartu, Estonia
J. M. Cordes
Affiliation:
Astronomy Department, Cornell University, Ithaca, NY14853

Abstract

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We discuss a twist in binary neutron star evolution scenarios in which a millisecond pulsar system is actually a progenitor for a low-mass X-ray binary system. After 7 billion years of orbital decay due to gravitational radiation, the millisecond pulsar PSR J0751+1807 will enter a low-mass X-ray binary phase. When the orbital period reaches about 5 minutes, the white dwarf will overflow its Roche lobe, transferring mass to the neutron star. Its predicted observational X-ray parameters are very similar to the ultra-compact low-mass X-ray binary 1820–303. The ultimate fate of the system after Roche-lobe overflow is unknown. One possibility is that the companion may eventually tidally disrupt, leaving a disk of material which could form into planets.

Type
Part 7 Binary Systems
Information
International Astronomical Union Colloquium , Volume 160: Pulsars: Problems and Progress , 1996 , pp. 521 - 522
Copyright
Copyright © Astronomical Society of the Pacific 1996

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