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SPECTROSCOPIC BINARY ORBITS FROM PHOTOELECTRIC RADIAL VELOCITIES

机译：光电径向速度的光谱二元轨道

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摘要

The distributions of the radial velocities of stars near the Galactic Poles, where radial velocities largely equate to z motions, offer some insights into Galactic dynamics. Yoss & Griffin~1 published in 1997 an analysis based on a comprehensive catalogue of the radial velocities and photometrically estimated spectral types and luminosities for about 900 late-type stars, including almost all of those having types of G_5 and later in the Henry Draper Catalogue, at Galactic latitudes above 75°. An extension of the investigation to fainter and more distant stars was begun， but has not been completed or published, on the basis of a listing of such stars by Upgren~2. 'Copenhagen-style' narrow-band photometry was obtained a long time ago for many of the Upgren stars, and radial-velocity measurements that were begun in 1972 have proved certain of them to be spectroscopic binaries. The orbits of six of them, including one double-lined object (U 29° 56) are presented in this paper. The proximity of one of them to the 5?~m star 4 Comae - itself a late-type North-Galactic-Pole star and an Upgren object - led to a renewed interest in that star (for which an orbit was published before the present writer was born) and the recognition that it is double-lined; a preliminary SB_2 orbit is presented.
机译：星系杆附近恒星的径向速度分布（其中径向速度在很大程度上等于z运动）为银河系动力学提供了一些见识。 Yoss＆Griffin〜1于1997年发表了一项分析，该分析基于径向速度的综合目录以及对约900个晚类型恒星进行光度估计的光谱类型和光度的分析，其中包括几乎所有G_5类型以及后来的亨利·德雷珀（Henry Draper）目录，在75°以上的银河纬度上。根据Upgren〜2列出的这类恒星的清单，已经开始将研究范围扩大到较暗的和较远的恒星，但尚未完成或发表。很早以前就为许多Upgren恒星获得了“哥本哈根式”窄带测光法，并且从1972年开始进行的径向速度测量已证明其中某些是光谱双星。本文介绍了其中的六个轨道，包括一个双线物体（U 29°56）。其中一颗靠近5？m星4号彗星-它本身是晚型的北银河极星和Upgren天体-引起了对该星的新兴趣（在此之前，该恒星已经发布了轨道）作家出生），并认识到它是双线的;提出了一个初步的SB_2轨道。

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