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arXiv 2510.04565astro-ph.SR
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十个全新的超紧凑三食三星系统

Ten new, ultracompact triply eclipsing triple star systems

T. Borkovits, S. A. Rappaport, T. Mitnyan, R. Gagliano, T. Jacobs, B. Powell, V. Kostov, M. Omohundro, M. H. Kristiansen, I. Terentev, H. M. Schwengeler, D. LaC… 展开作者

T. Borkovits, S. A. Rappaport, T. Mitnyan, R. Gagliano, T. Jacobs, B. Powell, V. Kostov, M. Omohundro, M. H. Kristiansen, I. Terentev, H. M. Schwengeler, D. LaCourse, Z. Garai, T. Pribulla, I. B. Bíró, I. Csányi, Z. Dencs, A. Pál

AI总结:

本研究基于TESS及补充地基观测数据,对10个新发现的外轨道周期≤101.4天的超紧凑三食三星开展光动力学分析,测定其参数并结合已有样本统计这类系统的整体性质。

摘要:

我们利用空间望远镜TESS(凌日系外行星巡天卫星)的观测数据,识别出了一百余个近距三食层级三星系统。其中多数系统的外轨道周期小于或接近100天,因此我们将其称为“超紧凑层级三星”。这类系统的突出价值在于,我们有望高精度测定其动力学与天体物理参数,在很多情况下甚至无需依赖视向速度数据。本文报道了对取自该大样本、位于黄道北半球的十个全新超紧凑三食三星系统的综合研究,这十个系统的TIC编号分别为198581208、265274458、283846096、337993842、351404069、378270875、403792414、403916758、405789362、461500036。本研究的大部分数据来自TESS观测,同时我们还为其中两个系统获取了补充性地基测光测量数据。我们将从TESS及地基后续观测数据中提取的食计时变化曲线、测光光变曲线以及光谱能量分布相结合,开展复杂的光动力学分析,得到了全部十个系统的恒星参数与轨道参数。这些系统的外轨道周期范围为46.8-101.4天。我们在四个系统中发现了第三天体引发的快速近点进动。此外,我们发现TIC 403916758是一个双孪生三星系统(即其内、外轨道的质量比均接近1)。所有系统均呈现显著的共面性,轨道互倾角小于5°。最后,我们将本文得到的十个系统的结果,与此前工作中报道的另外30余个紧凑三星系统的参数相结合,从统计层面检验这类系统的部分整体性质。

英文摘要:

We have identified more than a hundred close triply eclipsing hierarchical triple star systems from data taken with the space telescope TESS. Many of them have outer periods less than or, close to 100 days, hence, we call them `ultracompact hierarchical triples'. These systems are noteworthy in that we can potentially determine their dynamical and astrophysical parameters with a high precision, in many cases even without radial velocity data. In the present paper we report the comprehensive study of ten new ultracompact triply eclipsing triple star systems, located in the northern ecliptic hemisphere, taken from this larger sample: TICs 198581208, 265274458, 283846096, 337993842, 351404069, 378270875, 403792414, 403916758, 405789362, 461500036. Most of the data for this study come from TESS observations, but we obtained supplemental ground-based photometric measurements for two of the systems. The eclipse timing variation curves extracted from the TESS and the ground-based follow up data, the photometric light curves, and the spectral energy distribution are combined in a complex photodynamical analysis to yield the stellar and orbital parameters of all ten systems. The outer periods are in the range of 46.8-101.4 days. We found third-body forced, rapid apsidal motion in four systems. Moreover, TIC 403916758 was found to be a double twin triple (i.e. both the inner and the outer mass ratios are close to unity). All of the systems are substantially flat, with mutual inclination angles of $<5^o$. Finally, we have taken the results for the ten systems in the present paper, and combined them with the system parameters for more than 30 other compact triples that we have reported on in previous work, in order to examine some of the global properties of these systems on a statistical basis.

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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