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arXiv 1809.05640astro-ph.SR
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矮新星AT Cancri的相干亮度调制

Coherent brightness modulations in the dwarf nova AT Cancri

Albert Bruch, James Boardman, Lewis M. Cook, Michael J. Cook, Shawn Dvorak, James L. Jones, John W. Rock, Geoffrey Stone, Joseph H. Ulowetz

摘要:

分析了2016年和2018年在静止期间观测到的Z Cam型矮新星AT Cnc的光变曲线。在小时的时间尺度上,以前关于周期性的报告,特别是负超级峰的存在,无法得到证实。相反,一个调制周期等于光谱轨道周期被检测到,我们因此解释为一个表现形式的二进制革命。它使我们能够推导出该期间的更准确值0.201634 $\pm$ 0.000005天(或其别名0.021580天)。AT Cnc还表现出一个迄今未报道的调制25.731 $\pm$ 0.005分,稳定的周期,但不是在整个两年的观测时基振幅。我们尝试性地解释这种调制的上下文中的中间极性模型的系统。

英文摘要:

Light curves of the Z Cam type dwarf nova AT Cnc observed during standstill in 2016 and 2018 are analyzed. On the time scale of hours, previous reports on periodicities, in particular the presence of negative superhumps, could not be confirmed. Instead, a modulation with a period equal to the spectroscopic orbital period was detected which we thus interpret as a manifestations of the binary revolution. It enables us to derive a more accurate value of 0.201634 $\pm$ 0.000005 days (or its alias of 0.021580 days) for the period. AT Cnc also exhibits a hitherto unreported modulation of 25.731 $\pm$ 0.005 min, stable in period but not in amplitude over the entire time base of two years of the observations. We tentatively interpret this modulation in the context of an intermediate polar model for the system.

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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