Super-orbital period in the high-mass X-ray binary 2S 0114+650
Abstract
We report the detection of a stable super-orbital period in the high-mass X-ray binary 2S 0114+650. Analyses of data from the Rossi X-ray Timing Explorer All-Sky Monitor from 1996 January 5 to 2004 August 25 reveal a super-orbital period of 30.7+/-0.1 d, in addition to confirming the previously reported neutron star spin period of 2.7 h and the binary orbital period of 11.6 d. It is unclear if the super-orbital period can be ascribed to the precession of a warped accretion disc in the system.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- April 2006
- DOI:
- 10.1111/j.1365-2966.2006.10150.x
- arXiv:
- arXiv:astro-ph/0502008
- Bibcode:
- 2006MNRAS.367.1457F
- Keywords:
-
- accretion;
- accretion discs;
- stars: neutron;
- X-rays: binaries;
- Astrophysics
- E-Print:
- 5 pages, 5 figures, submitted to MNRAS 27th January 2005. Manuscript expanded to include discussion of evolution of periods, and hardness ratio variability. Number of figures increased from 5 to 9. Accepted for publication 19th December 2005