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arXiv 2103.15322astro-ph.SR
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两个接触双星ASAS J124343 +1531.7和LINEAR 2323566的首次光度学研究和光谱分析

The first photometric investigation and spectroscopic analysis of two contact binaries: ASAS J124343+1531.7 and LINEAR 2323566

Qiqi Xia, Raul Michel, Kai Li, Jesus Higuera

摘要:

ASAS J124343+1531.7和LINEAR 2323566的多色通带CCD光变曲线首先由0.84米的Ritchey-Chrétien望远镜获得,随后由WIYN 0.90米的卡塞格伦望远镜进行观测。来自ASAS J124343+1531.7的$Transiting\quad Exoplanet\quad Survey\quad Satellite\quad (TESS)$的数据也用于后续分析。通过W-D程序对数据进行分析,得到它们的质量比和填充因子分别为3.758、1.438和31.8 $\%$、14.9 $\%$。ASAS J124343+1531.7是W亚型中接触双星,LINEAR 2323566是W亚型浅接触双星,光变曲线的不对称性证明它们都具有O 'Connell效应,而O' Connell效应一般用磁活动来解释。计算了H $_α$谱线的等效宽度,表明它们确实具有磁活性。此外,LINEAR 2323566具有较强的磁活性。对轨道周期变化的分析表明,ASAS J124343+1531.7具有长期周期增加的趋势,这通常是由质量较小的恒星向质量较大的恒星的质量转移所解释的。根据估计的绝对参数,讨论了它们的演化状态。ASAS J124343+1531.7的两颗恒星都是主序星。而对于LINEAR 2323566来说,质量较大的恒星是主序星,质量较小的恒星已经演化出主序星,并且过于明亮和过大。

英文摘要:

The multi-color passband CCD light curves of ASAS J124343+1531.7 and LINEAR 2323566 were first obtained by the 0.84-m Ritchey-Chrétien telescope with follow up observations by the WIYN 0.90m Cassegrain telescope. The data from the $Transiting\quad Exoplanet\quad Survey\quad Satellite\quad (TESS)$ of ASAS J124343+1531.7 was also applied for subsequent analysis. By analyzing the data through the W-D program, their mass ratios and fill-out factors were determined as 3.758, 1.438 and 31.8$\%$, 14.9$\%$, respectively. ASAS J124343+1531.7 is a W-subtype median contact binary, while LINEAR 2323566 is a W-subtype shallow contact binary, and the asymmetric light curves prove that they both have the O'Connell effect, which is generally explained by magnetic activity. The equivalent widths (EWs) of H$_α$ lines were calculated, which show they certainly have magnetic activity. Moreover, LINEAR 2323566 has a stronger magnetic activity. The analysis of orbital period changes shows that ASAS J124343+1531.7 has a trend of secular period increase, which is generally explained by the mass transfer from the less massive to the more massive star. According to the estimated absolute parameters, their evolutionary states are discussed. The two components of ASAS J124343+1531.7 are both main sequence stars. While for LINEAR 2323566, the more massive star is a main sequence star, the less massive star has evolved out of main sequence and is over-luminous and over-sized.

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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