Near-periodical spin period evolution in the binary system LMC X-4
High Energy Astrophysical Phenomena
2016-11-15 v1
Abstract
In this paper we investigated the long-term evolution of the pulse-period in the high-mass X-ray binary LMC X-4 by taking advantage of more than 43~yrs of measurements in the X-ray domain. Our analysis revealed for the first time that the source is displaying near-periodical variations of its spin period on a time scale of roughly 6.8~yrs, making LMC X-4 one of the known binary systems showing remarkable long term spin torque reversals. We discuss different scenarios to interpret the origin of these torque reversals.
Cite
@article{arxiv.1610.09561,
title = {Near-periodical spin period evolution in the binary system LMC X-4},
author = {S. Molkov and A. Lutovinov and M. Falanga and S. Tsygankov and E. Bozzo},
journal= {arXiv preprint arXiv:1610.09561},
year = {2016}
}