The acceleration of the rotation of the X-ray pulsar Hercules X-1 - Results of Kvant module observations in August 1987-July 1988

Details The acceleration of the rotation of the X-ray pulsar Hercules X-1 - Results of Kvant module observations in August 1987-July 1988 The acceleration of the rotation of the X-ray pulsar Hercules X-1 - Results of Kvant module observations in August 1987-July 1988

Nov 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988pazh...14..979s&link_type=abstract

Pis'ma v Astronomicheskii Zhurnal (ISSN 0320-0108), vol. 14, Nov. 1988, p. 979-991. In Russian. In Russian. In Russian.

Physics

1

Acceleration (Physics), Pulsars, Stellar Rotation, X Ray Binaries, Light Curve, Pulsar Magnetospheres, Stellar Spectrophotometry, Variable Stars

Scientific paper

Observations of the international X-ray observatory "Roentgen" on the "Kvant" module in August 1987 revealed the significant decrease of the Hercules X-1 pulsation period. Further observations in 1988 allow to estimate the average period derivative P/P = (-4.9±1.5)×106year-1. Comparison of the "Kvant" data with previous observations has shown that in 1984 - 1988 Hercules X-1 underwent quasistationary acceleration like that one observed in 1972 - 1978.

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