What makes an accretion-powered millisecond pulsar?

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

We investigate the dependence of pulse amplitudes of accreting millisecond pulsars on the masses of the neutron stars. Because pulsation amplitudes are suppressed as neutron stars become more massive, the probability of detection of pulsations decreases in systems that have been accreting for a long time. However, the probability of detectable pulsations is higher in transient systems where mass accretion is sporadic and the neutron star is likely to have a low mass. We propose this mechanism as the explanation of the small number of millisecond X-ray pulsars found to date, as well as their emergence as fast pulsars mostly in transient, low-M systems. This mechanism can also quantitatively explain the lack of pulsars in the majority of low-mass X-ray binaries.

Original languageEnglish (US)
Pages (from-to)1678-1683
Number of pages6
JournalAstrophysical Journal
Volume691
Issue number2
DOIs
StatePublished - Feb 1 2009

Fingerprint

pulsars
accretion
neutron stars
pulse amplitude
x rays

Keywords

  • stars: neutron
  • X-rays: stars

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

What makes an accretion-powered millisecond pulsar? / Ozel, Feryal.

In: Astrophysical Journal, Vol. 691, No. 2, 01.02.2009, p. 1678-1683.

Research output: Contribution to journalArticle

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