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arXiv 1406.7262astro-ph.HE
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两个神秘黑洞候选者GRS 1915+105和IGR J17091-3624的周期

Periods of two enigmatic black hole candidates GRS 1915+105 and IGR J17091-3624

Arindam Ghosh, S. K. Chakrabarti

摘要:

银河系黑洞候选者GRS 1915+105和IGR J17091-3624在光变曲线和光谱性质上有许多相似之处。然而,人们对它们同伴的轨道要素知之甚少。在轨道偏心的情况下,黑洞对伴星的潮汐力会引起轨道时间尺度上吸积率的调制。我们在这两个天体的光变曲线中寻找这些调制,发现它们的周期分别约为28.3 d(29.0 d)和32.2 d。偏心率最大分别为0.071和0.46。我们的结论是,这两个对象都有很长的轨道周期和偏心。这可能是为什么光变曲线有几个类似的可变性类过渡文献中报道的原因。

英文摘要:

Galactic black hole candidates GRS 1915+105 and IGR J17091-3624 have many similarities in their light curves and spectral properties. However, very little is known about the orbital elements of their companions. In case the orbits are eccentric, tidal forces by the black hole on the companion can cause modulations of accretion rates in orbital time scale. We look for these modulations in the light curves of these two objects and find that their periodicities are around 28.3 d (29.0 d) and 32.2 d respectively. Eccentricities are at the most 0.071 and 0.46 respectively. We conclude that both these objects have long orbital periods and are eccentric. This could be a reason why light curves have several similar variability class transitions as reported in the literature.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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