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arXiv 2408.01019astro-ph.SR
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基于TESS数据新发现的五颗具有潮汐激发振荡的心跳星系统

Five New Heartbeat Star Systems with Tidally Excited Oscillations Discovered Based on TESS Data

Min-Yu Li, Sheng-Bang Qian, Ai-Ying Zhou, Li-Ying Zhu, Wen-Ping Liao, Er-Gang Zhao, Xiang-Dong Shi, Fu-Xing Li, Qi-Bin Sun

AI总结:

本文基于TESS数据发现五颗具有潮汐激发振荡的新心跳星,利用MCMC方法修正轨道参数并识别脉动模式,为研究偏心双星结构及扩充TESS心跳星星表提供宝贵样本。

摘要:

具有潮汐激发振荡(TEOs)的心跳星(HBSs)是研究系统内部性质的理想天体物理实验室。本文利用TESS测光数据发现了五颗新的表现出TEOs的心跳星。基于马尔可夫链蒙特卡洛(MCMC)方法,采用Kumar等人模型的修正版本推导了轨道参数。对这些天体中的TEOs进行了检验,并识别了它们的脉动相位和模式。TIC 266809405、TIC 266894805和TIC 412881444中TEOs的脉动相位与主导的l=2、m=0或±2球谐函数一致。对于TIC 11619404,尽管TEO相位接近m=+2模式,但由于该系统倾角较低,不能排除m=0模式。TIC 447927324中的TEO相位显示出与绝热预期的大偏差(>2σ),表明它可能是一种行波而非驻波。此外,这些TEOs出现在相对较低的轨道谐波上,我们谨慎地提出这可能是一种观测偏差。这些天体是研究偏心轨道双星结构和演化以及扩展含TEOs的TESS心跳星星表的宝贵样本。

英文摘要:

Heartbeat stars (HBSs) with tidally excited oscillations (TEOs) are ideal astrophysical laboratories for studying the internal properties of the systems. In this paper, five new HBSs exhibiting TEOs are discovered using TESS photometric data. The orbital parameters are derived using a corrected version of Kumar et al.'s model based on the Markov Chain Monte Carlo (MCMC) method. The TEOs in these objects are examined, and their pulsation phases and modes are identified. The pulsation phases of the TEOs in TIC 266809405, TIC 266894805, and TIC 412881444 are consistent with the dominant $l=2$, $m=0$, or $\pm2$ spherical harmonic. For TIC 11619404, although the TEO phase is close to the $m=+2$ mode, the $m = 0$ mode cannot be excluded because of the low inclination in this system. The TEO phase in TIC 447927324 shows a large deviation ($>2σ$) from the adiabatic expectations, suggesting that it is expected to be a traveling wave rather than a standing wave. In addition, these TEOs occur at relatively low orbital harmonics, and we cautiously suggest that this may be an observational bias. These objects are valuable sources for studying the structure and evolution of eccentricity orbit binaries and extending the TESS HBS catalog with TEOs.

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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