Pulse frequency changes of 1E 2259+586 and the binary interpretation

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1996-03-20

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Baykal, Altan

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Pulse frequencies from the archival ROSAT observations of 1E 2259+586 are presented. A short-term spin-up episode superposed on the secular spin-down trend is observed. Combining the previously published pulse frequencies, we estimate the variance of the angular velocity over a 15 yr span of observations. The level of fluctuations in angular velocity is similar to that of established accreting binary neutron stars. These results favor accretion by a neutron star from a very low mass companion as the source of the X-ray luminosity, although accretion by a solitary neutron star from a residual disk might be possible.

Subject Keywords

Binaries, Close, Pulsars, İndividual (1E 2259+586), X-Rays, Stars

URI

https://hdl.handle.net/11511/48212

Journal

ASTROPHYSICAL JOURNAL

DOI

https://doi.org/10.1086/176985

Collections

Department of Physics, Article

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Citation Formats

A. Baykal, “Pulse frequency changes of 1E 2259+586 and the binary interpretation,” ASTROPHYSICAL JOURNAL, pp. 470–477, 1996, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/48212.