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arXiv 2609.35422astro-ph.SR

V405 Draconis:一个具有第三伴星和四合星系统候选体的深度相接双星

V405 Draconis: A Deep Contact Binary with a Tertiary Companion and a Quadruple System Candidate

Maksym Yu. Pyatnytskyy, Ivan L. Andronov

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中文总结 AI 辅助

本文通过分析V405 Dra的O-C图,精化了第三伴星轨道参数并探测到可能的第四体,但第四体模型无法完全解释长期趋势,部分变化仍待解释。

中文摘要 AI 辅助

我们利用最近可用的数据,继续对EW型食双星V405 Dra的O-C图进行分析。我们精化了导致O-C曲线中短周期振荡的第三体的轨道参数,得到$P_3=513.12(20)$天,$a_{12}\sin i_3=0.3862(15)$天文单位,以及$e_3=0.1690(48)$。假设食双星的总质量为$1.56$个太阳质量,则第三体的最小质量估计约为$0.5$个太阳质量。我们还研究了复杂的长期O-C趋势,发现其可能部分由可能的第四体引起的光行时效应解释,其特征周期约为23.5年,最小质量约为$0.9$个太阳质量。然而,第四体模型无法完全重现观测到的长期变化,尤其是最早的数据,部分长期趋势的性质仍然无法解释。

英文摘要

We continued our analysis of the O-C diagram of the EW-type eclipsing binary V405 Dra using recently available data. We refined the orbital parameters of the third body responsible for the short-period oscillations in the O-C curve, obtaining $P_3=513.12(20)$ d, $a_{12}\sin i_3=0.3862(15)$ AU, and $e_3=0.1690(48)$. Assuming a total mass of $1.56$ $M_\odot$ for the eclipsing binary, the minimum mass of the third body is estimated to be about $0.5$ $M_\odot$. We also investigated the complex long-term O-C trend and found that it may be partially explained by the light-time effect caused by a possible fourth body, with a characteristic period of about 23.5 yr and a minimum mass of about $0.9$ $M_\odot$. However, the fourth-body model cannot fully reproduce the observed long-term variation, particularly the earliest data, and the nature of part of the long-term trend remains unexplained.

发表机构

  • Private Observatory ”Osokorky”(奥索科尔基私人天文台)
  • Department ”Higher Mathematics”, Odesa National Maritime University(敖德萨国立海事大学高等数学系)

机构由 AI 辅助整理,请以论文原文为准。

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