【摘要】 天琴RR型变星是天文学上标定距离时的主要示距天体之一,对它的绝对星等研究在银河系的结构、形成、演化乃至宇宙学上都具有重要意义。Baade-Wesselink方法是唯一利用脉动变星的内禀物理参量来研究和确定天琴RR型变星绝对星等的方法,本文介绍和评述了该方法研究天琴RR型变星绝对星等的最新结果和进展以及使用Baade-Wesselink方法确定天琴RR型变星绝对星等时应注意的几个问题。更多还原

【Abstract】 RR Lyrae variables represent one of the most effective distance indicators. They are of great significance not only for the distance-scale problems in the Galaxy and extragalactic system but also for the structure and the formation of the Galaxy, and of cosmological implication.Among the methods used to determine the absolute magnitude of RR Lyrae stars, the Baade-Wesselink method is the only one that is based on the intrisic properties of the stars, i. e. luminosity, colour, and radial velocity variations over the pulsation cycle. This paper gives a review of recent results of absolute magnitude of RR Lyrae stars with Baade-Wesselink method and points out that there are several problems which must be paid attention to for determining absolute magnitude of RR Lyrae stars using the B-W method.更多还原