A1 Refereed original research article in a scientific journal

Near-periodical spin period evolution in the binary system LMC X-4



Authors: Molkov S, Lutovinov A, Falanga M, Tsygankov S, Bozzo E

Publisher: OXFORD UNIV PRESS

Publication year: 2017

Journal: Monthly Notices of the Royal Astronomical Society

Journal name in source: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY

Journal acronym: MON NOT R ASTRON SOC

Volume: 464

Issue: 2

First page : 2039

Last page: 2045

Number of pages: 7

ISSN: 0035-8711

eISSN: 1365-2966

DOI: https://doi.org/10.1093/mnras/stw2429

Self-archived copy’s web address: https://research.utu.fi/converis/portal/detail/Publication/28601063


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 yr 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 yr, 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.

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Last updated on 2024-26-11 at 22:57