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arXiv 2102.00631astro-ph.SR
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Be星V923 Aql = HD 183656的长期、轨道和快速变化

Long-term, orbital, and rapid variations of the Be star V923 Aql = HD 183656

M. Wolf, P. Harmanec, H. Božić, P. Koubský, S. Yang, D. Ruždjak, M. Šlechta, H. Ak, H. Bakış, V. Bakış, A. Oplištilová, K. Vitovský

摘要:

我们提出了一个长期观测项目的最新结果,旨在观察,从文献中收集,并均匀的光,颜色和光谱变化的著名的发射线Be星V923 Aql。我们对这些参数的分析证实,所有的观测值都表现出周期变化,周期长度在1800到3000天之间,迄今为止记录了7个连续的周期。我们表明,这些变化可以在星周盘单臂振荡模型的框架内定性地理解,其中密度增加的波和空间中的前进旋转。我们确认了该天体的二进制性质,周期为214.716天,并估计了可能的系统性质。我们还确认了快速光的存在,并且可能还有光谱变化。然而,我们无法就其性质提供任何确定的结论。作为这项工作的后续行动,计划对长期变化进行定量建模研究。

英文摘要:

We present the latest results of a long-term observational project aimed at observing, collecting from the literature, and homogenising the light, colour, and spectral variations of the well-known emission-line Be star V923 Aql. Our analysis of these parameters confirms that all of the observables exhibit cyclic changes with variable cycle length between about 1800 and 3000 days, so far documented for seven consecutive cycles. We show that these variations can be qualitatively understood within the framework of the model of one-armed oscillation of the circumstellar disk, with a wave of increased density and prograde revolution in space. We confirm the binary nature of the object with a 214.716 day period and estimate the probable system properties. We also confirm the presence of rapid light, and likely also spectral changes. However, we cannot provide any firm conclusions regarding their nature. A quantitative modelling study of long-term changes is planned as a follow-up to this work.

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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