天蝎座新星AD 1437遗迹(IGR J17014-4306)轨道周期的快速变化

Lei Zang, Shengbang Qian, Li Zhang, Qibin Sun, Linfeng Chang, Berto Monard, Gordon Myers and Franz-Josef Hambsch
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引用次数: 0

摘要

IGR J17014-4306是已知轨道周期最长(12.8小时)的深食中极,在那里一颗大质量白矮星(WD)通过吸积盘从伴星吸积物质。根据凌日系外行星巡天卫星空间望远镜的光度观测和美国变星观测者协会的数据库,确定了70个日食时间。还证实了自旋脉冲轮廓确实发生了变化,这是由于自旋频率及其一次谐波的振幅变化趋势相反。这可能与吸积速率的波动有关。自旋周期有轻微波动,但没有明显的变化趋势。我们构建了O-C图,发现轨道周期以高速率增加,这与致密双星超软x射线源和复发新星的轨道周期相当。轨道周期的持续增加是由于质量较小的伴星在其热时间尺度上以较高的速率向黑洞转移。这些结果表明,IGR J17014-4306是研究新星喷发、实际角动量损失机制和灾变变量整体演化的有趣目标。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Rapid Change in the Orbital Period of the Remnant of Nova Scorpii AD 1437 (IGR J17014-4306)
IGR J17014-4306 is the longest orbital period (12.8 hr) deep-eclipsing intermediate polar known, where a massive white dwarf (WD) accretes matter from its companion star via an accretion disk. Based on photometric observations from the Transiting Exoplanet Survey Satellite space telescope and the American Association of Variable Star Observers database, 70 eclipse timings were determined. It was also confirmed that the spin pulse profile of the WD does change, which is due to the amplitude variation with opposite trends in spin frequency and its first harmonic. This may be related to fluctuations in the accretion rate. The spin period shows slight fluctuations but no significant changing trends. We constructed the O–C diagram and discovered that the orbital period is increasing at a high rate of , which is comparable to those detected in compact binary supersoft X-ray sources and recurrent novae. This continuous increase in the orbital period is caused by the mass transfer from the less-massive companion to the WD on its thermal timescale at a high rate. All these findings suggest that IGR J17014-4306 is an interesting target to investigate nova eruption, the real angular momentum loss mechanism, and the overall evolution of cataclysmic variables.
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