Superorbital period variations in the X-ray pulsar LMC X-4 |
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| Authors: | B. Paul S. Kitamoto |
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| Affiliation: | (1) Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, 400005 Mumbai, India;(2) Department of Physics, Rikkyo University, Nishii-Ikebukuro, 3-34-1, Toshima-ku, 171-8501 Tokyo, Japan |
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| Abstract: | We report the discovery of a decay in the superorbital period of the binary X-ray pulsar LMC X-4. Combining archival data and published long term X-ray light curves, we have found a decay in the third period in this system (P ∼ 30.3 day, P ∼ −2 × 10−5 s s−1). Along with this result, a comparison of the superorbital intensity variations in LMC X-4, Her X-1 and SMC X-1 is also presented. |
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| Keywords: | Accretion, accretion disks stars: individual (LMC X-4) stars: neutron X-rays: stars, binaries |
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