期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 515, 期 3, 页码 3773-3795出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stac1983
关键词
binaries: close; binaries: eclipsing; stars: individual: KIC 6964043; stars: individual: KIC 5653126; stars: individual: KIC 5731312; stars: individual: KIC 8023317
资金
- ELTE Eotvos Lorand University [4000137122]
- European Space Agency [ESA-D/SCI-LE-2021-0025]
- city of Szombathely
- Netherlands Research Council NWO [VENI 639.041.645, VIDI 203.061]
- National Research, Development, and Innovation Office (NKFIH), Hungary - European Union [GINOP 2.3.2-15-2016-00033]
- NASA Science Mission directorate
- NASA [NAS5-26555]
- NASA Office of Space Science [NNX09AF08G]
We report the results of photodynamical analyses of four compact triple stellar systems, showing remarkable eclipse timing and depth variations. We obtained precise astrophysical parameters and orbital elements of the stars, and found that two systems exhibit high inclination and observable retrograde apsidal motion. Short-term numerical simulations suggest ongoing eccentricity variations, while longer-term predictions indicate possible dynamical instability or common envelope phases.
We report the results of the photodynamical analyses of four compact, tight triple stellar systems, KICs 6964043, 5653126, 5731312, and 8023317, based largely on Kepler and TESS data. All systems display remarkable eclipse timing and eclipse depth variations, the latter implying a non-aligned outer orbit. Moreover, KIC 6964043 is also a triply eclipsing system. We combined photometry, ETV curves, and archival spectral energy distribution data to obtain the astrophysical parameters of the constituent stars and the orbital elements with substantial precision. KICs 6964043 and 5653126 were found to be nearly flat with mutual inclinations i(mut) = 4.degrees 1 and 12 degrees 3, respectively, while KICs 5731312 and 8023317 (i(mut) = 39 degrees 4 and 55.degrees 7, respectively) are found to lie in the high i(mut) regime of the von Zeipel-Kozai-Lidov (ZKL.) theorem. We show that, currently, both high inclination triples exhibit observable unusual retrograde apsidal motion. Moreover, the eclipses will disappear in all but one of the four systems within a few decades. Short-term numerical integrations of the dynamical evolution reveal that both high inclination triples are currently subject to ongoing, large amplitude (Delta e similar to 0.3) inner eccentricity variations on centuries-long time-scales, in accord with the ZKL theorem. Longer-term integrations predict that two of the four systems may become dynamically unstable on similar to Gyr time-scales, while in the other two triples common envelope phases and stellar mergers may occur. Finally, we investigate the dynamical properties of a sample of 71 KIC/TIC triples statistically, and find that the mutual inclinations and outer mass ratios are anticorrelated at the 4 sigma level. We discuss the implications for the formation mechanisms of compact triples.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据