视向速度标准星

Radial-velocity Standard Stars

本文简述至今仍在沿用的视向速度标准星体系及其主要特点,这一体系的更新所面临的任务和已取得的某些进展,为恒星视向速度实测基础在我国的建立提供参考。文末所写今后工作可作为对文献[12]的发挥和补充。

A brief description is given of the system of radial-velocity (RV) standard stars still in use (section I) and its shortcomings (section II). The Kick Observatory RV reference stars and Griffin's RV reference stars, both having been referred to as standard stars in some literature, receive some attention in section III along with efforts to establish a system of early-type RV reference stars. Section IV gives the salient points of the conclusions and recommendations of J. Andersen's report of the Working Group on RV standard stars in Trans. IAU XXB (1990), followed by recent progress concerning HD 114762, fibre spectroscopy performance, high-precision observation* of 6 bright K-type standards, Arcturus, Vega and the stability of the Dominion Astro-physical Observatory coude spectrograph. Among desirable future work frequent RV measurements of (3 Gem and a Ari from the northern hemisphere, greater effort in defining a system of early-type RV standard or reference stars properly allowing for ' stellar rotation, continued RV observations of asteroids, and a time-resolved precision RV study of Vega, both short-term (preferably simultaneously with photometry) and long-term, are suggested.