On the pulse-period evolution of the X-ray pulsar 1E 2259+586.

Details On the pulse-period evolution of the X-ray pulsar 1E 2259+586. On the pulse-period evolution of the X-ray pulsar 1E 2259+586.

Dec 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26a...316..111p&link_type=abstract

Astronomy and Astrophysics, v.316, p.111-114

Astronomy and Astrophysics

Astrophysics

2

Pulsars: Individual: 1E 2259+586 (1E 2259+58.6), White Dwarfs

Scientific paper

Precession of spin motion is considered for rapidly rotating massive white dwarfs. We suggest that the X-ray pulsar 1E 2259+586 may be such an object. A modulation of spin period due to precessional motion of spin axis about the axis of symmetry may explain the change in period. lt is shown that this may be responsible for the decrease in the mean spin-down rate which was observed for 1E 2259+586 between the year 1987 and 1990. The low-mass X-ray binary models for the pulsar have also been outlined. One finds that a number of observations of 1E 2259+586 may be explained in the framework of this model although the companion is uncertain. Thus, the present data are not sufficient enough to warrant the discussion of either of the two models.

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