Superorbital Period in the High Mass X-ray Binary 2S 0114+650
Astrophysics
2009-11-10 v2
Abstract
We report the detection of a superorbital period in the high-mass X-ray binary 2S 0114+650. Analyses of data from the Rossi X-ray Timing Explorer (RXTE) All-Sky Monitor (ASM) from 1996 January 5 to 2004 August 25 reveal a superorbital 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 superorbital period can be ascribed to the precession of a warped accretion disc in the system.
Cite
@article{arxiv.astro-ph/0502008,
title = {Superorbital Period in the High Mass X-ray Binary 2S 0114+650},
author = {S. A. Farrell and R. K. Sood and P. M. O'Neill},
journal= {arXiv preprint arXiv:astro-ph/0502008},
year = {2009}
}
Comments
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