Thermal state of transiently accreting neutron stars

Details Thermal state of transiently accreting neutron stars Thermal state of transiently accreting neutron stars

2002-09-02

arxiv.org/abs/astro-ph/0209027v2

Astron.Astrophys. 407 (2003) 265-272

Astronomy and Astrophysics

Astrophysics

7 pages, 2 figures, revised after the referee remarks, to appear in A&A

Scientific paper

10.1051/0004-6361:20030830

We study thermal states of transiently accreting neutron stars (with mean accretion rates $\dot{M} \sim 10^{-14}-10^{-9}$ M$_\odot$ yr$^{-1}$) determined by the deep crustal heating of accreted matter sinking into stellar interiors. We formalize a direct correspondence of this problem to the problem of cooling neutron stars. Using a simple toy model we analyze the most important factors which affect the thermal states of accreting stars: a strong superfluidity in the cores of low-mass stars and a fast neutrino emission (in nucleon, pion-condensed, kaon-condensed, or quark phases of dense matter) in the cores of high-mass stars. We briefly compare the results with the observations of soft X-ray transients in quiescence. If the upper limit on the quiescent thermal luminosity of the neutron star in SAX J1808.4-3658 (Campana et al. 2002) is associated with the deep crustal heating, it favors the model of nucleon neutron-star cores with switched-on direct Urca process.

Affiliated with

Also associated with

No associations

Rating

Thermal state of transiently accreting neutron stars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Thermal state of transiently accreting neutron stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thermal state of transiently accreting neutron stars will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-280551