The role of binding energies of neutron stars on the accretion driven evolution

Abstract

Millisecond pulsars are believed to descend from low mass x-ray binaries. Observable parameters of binary millisecond pulsars e.g. mass of the pulsar, mass of the companion, spin period of the pulsar, orbital period, orbital eccentricity etc are used to probe the past accretion history of the millisecond pulsars. But unfortunately in these studies, binding energy of the neutron star is not considered commonly. We show that the effect of the binding energy is significant in the estimation of the amount of mass accretion and thus should be incorporated in models for binary evolutions. Moreover, different Equations of State for dense matter give different values for the accreted mass for the same amount of increase in the gravitational mass of the neutron star implying the need of constraining dense matter Equations of State even to understand the spin-up procedure properly.

Accepted for publication in MNRAS Letters

References in corpus (5)

• Shapiro delay measurement of a two solar mass neutron star
• A Radio Pulsar/X-ray Binary Link
• Astrophysical Measurement of the Equation of State of Neutron Star Matter
• An Eccentric Binary Millisecond Pulsar in the Galactic Plane
• Rotational parameters of strange stars in comparison with neutron stars

Cited by in corpus (4)

• The Effect of Transient Accretion on the Spin-Up of Millisecond Pulsars
• Impact of the equation-of-state -- gravity degeneracy on constraining the nuclear symmetry energy from astrophysical observables
• Millisecond radio pulsars with known masses: parameter values and equation of state models
• Formation of redbacks via accretion induced collapse