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arXiv 1909.07595astro-ph.SR
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星震学:双星统计的新窗口

Asteroseismology as a new window to statistics of binaries

Hiromoto Shibahashi, Simon J. Murphy

摘要:

利用开普勒航天任务4年多来对脉动星相位调制的超高精度不间断测光,新发现了340多颗中间周期(100-1000 d)的非食A-F型主星双星,并测定了它们用常规方法难以测量且非常不完整的轨道参数。这一双星的星震发现使具有完整轨道解的中等质量双星的数量增加了两倍,并为双星的统计打开了一个新的窗口。本文概述了用测光法寻找不食双星和推导轨道参数的方法,并证明了它们的有效性。然后对新发现的双星和已知的A-F主序星附近的光谱双星进行了统计研究,利用Abel型积分方程将质量函数中的分布转化为质量比分布。

英文摘要:

More than 340 non-eclipsing binaries of A-F stars as primaries at intermediate periods (100-1000 d) were newly found by uninterrupted photometry with ultra high-precision taken over 4 yr by Kepler space mission via the phase modulation of pulsating stars, and their orbital parameters, which were difficult to measure with conventional methods and were very incomplete, were then determined. This asteroseismic finding of binaries tripled the number of intermediate-mass binaries with full orbital solutions, and opened a new window to statistics of binaries. We outline the methods of finding non-eclipsing binaries by photometry and of deriving the orbital parameters, and demonstrate their validation. Statistical study of the newly discovered binaries along with the known spectroscopic binaries near A-F main-sequence are then presented, converting distribution in the mass-function into the mass-ratio distribution with the help of Abel-type integral equation.

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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