35 day cycle and the rotation period of HER X-1

Details 35 day cycle and the rotation period of HER X-1 35 day cycle and the rotation period of HER X-1

Feb 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985ssrv...40..347o&link_type=abstract

(ESA, ESLAB Symposium on X-Ray Astronomy in the EXOSAT Era, 18th, The Hague, Netherlands, Nov. 5-9, 1984) Space Science Reviews

Astronomy and Astrophysics

Astronomy

32

Stellar Rotation, X Ray Binaries, Accretion Disks, Data Correlation, Exosat Satellite, Phase Shift

Scientific paper

Sampling observations of a complete 35d cycle of Her X-1 during March 1, to April 5, 1984 with the low and medium energy X-ray detectors of EXOSAT are presented. The intensities measured in the Argon detectors are compared with the UHURU 35d light curve to obtain the turn-on times of two consecutive cycles as JD 2445753.0 + or - 1.0, and JD 2445788.0 + or - 0.5. The low energy data is used to determine the rotation period and its derivative as: 1.23779200 s + or 50 ns, and (-2 + or - 1) x 10 to the -13th respectively, at the epoch JD 2445778.56. Analysis of the pulse arrival phases indicate that during mid-on phase of the 35d cycle there is shift of about 180 deg. Evidence for the long term correlated changes of P35 and P1.24s is presented, confirming the low quality of the 35d clock and suggesting that the basic clock mechanism must lie in the disk structure itself.

Affiliated with

Also associated with

No associations

Rating

35 day cycle and the rotation period of HER X-1 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with 35 day cycle and the rotation period of HER X-1, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and 35 day cycle and the rotation period of HER X-1 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1595189