Accretion in the spin-down regime

K. Y. Ekşi*, E. Kutlu

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Citations (Scopus)

Abstract

Accretion driven millisecond X-ray pulsars can accrete over a wide range of mass flow rates. The pulsations persist even at small accretion rates at which these objects would be expected to be in the propeller stage. We argue that the inner regions of disks around millisecond X-ray pulsars are sufficiently thick that a fraction of the inflowing matter can accrete even in the spin-down regime from regions of the disk away from the disk plane. This allows these systems to be bright throughout a wide range of mass flow rates. We model the lightcurve of SAX J1808.4-3658 during an outburst and show that the rapid decay stage can be modeled with fractional accretion in the spin-down regime.

Original languageEnglish
Title of host publicationAstrophysics of Neutron Stars 2010 - A Conference in Honor of M. Ali Alpar
Pages156-159
Number of pages4
DOIs
Publication statusPublished - 2011
EventAstrophysics of Neutron Stars 2010 - A Conference in Honor of M. Ali Alpar - Cesme, Izmir, Turkey
Duration: 2 Aug 20106 Aug 2010

Publication series

NameAIP Conference Proceedings
Volume1379
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

ConferenceAstrophysics of Neutron Stars 2010 - A Conference in Honor of M. Ali Alpar
Country/TerritoryTurkey
CityCesme, Izmir
Period2/08/106/08/10

Keywords

  • Accretion disks
  • Neutron stars
  • X-ray binaries

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