Superorbital Period Variations in the X-ray Pulsar LMC X-4

Journal of astrophysics and astronomy

S. Kitamoto¹  B. Paul² 

[1] Department of Physics, Rikkyo University, Nishii-Ikebukuro, 3-34-1, Toshima-ku, Tokyo, 171-8501, Japan.$$;Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai, 400 005, India.$$

关键词: Accretion;    accretion disks;    stars: individual (LMC X-4);    stars: neutron;    X-rays: stars;    binaries.;   

DOI  :  

学科分类：天文学(综合)

来源: Indian Academy of Sciences

【 摘 要 】

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, $dot{P}$ ∼ -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.

【 授权许可】

Unknown