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arXiv 0907.3480astro-ph.SRastro-ph.IM
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TRIMOR -分析三星系统多级光谱的三维相关技术;在HD188753中的应用

TRIMOR - three-dimensional correlation technique to analyze multi-order spectra of triple stellar systems; Application to HD188753

T. Mazeh, Y. Tsodikovich, Y. Segal, S. Zucker, A. Eggenberger, S. Udry, M. Mayor

摘要:

本文提出了一种新的三重体系多级谱分析算法TRIMOR。该算法是TRICOR的一个扩展,TRICOR是一种三维相关技术,从单级光谱中推导出三重恒星系统的径向速度。由多个阶次得到的组合相关使得能够探测和测量微弱的第三伴星的径向速度。该论文将TRIMOR应用于已知的三重星系HD 188753的光谱,得出了该系统中最暗恒星的径向速度。这使得三重系统中的近双星成为双线分光双星,从而得到了精确的质量比和倾角估计。密偶星的倾角非常接近于宽轨道的倾角,这与这个三重系统具有接近共面构型的断言一致。

英文摘要:

This paper presents a new algorithm, TRIMOR, to analyse multi-order spectra of triple systems. The algorithm is an extension of TRICOR, the three-dimensional correlation technique that derives the radial velocities of triple stellar systems from single-order spectra. The combined correlation derived from many orders enables the detection and the measurement of radial velocities of faint tertiary companions. The paper applied TRIMOR to the already available spectra of HD188753, a well known triple system, yielding the radial velocities of the faintest star in the system. This rendered the close pair of the triple system a double-lined spectroscopic binary, which led to a precise mass-ratio and an estimate of its inclination. The close-pair inclination is very close to the inclination of the wide orbit, consistent with the assertion that this triple system has a close to coplanar configuration.

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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