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| 红团簇巨星的绝对星等及其在天体测距方面的应用 | |
| 引用本文： | 高新华,陈力,侯金良,赵君亮.红团簇巨星的绝对星等及其在天体测距方面的应用[J].天文学进展,2011,29(1):31-45. |
| 作者姓名： | 高新华 陈力 侯金良 赵君亮 |
| 作者单位： | 1. 中国科学院,上海天文台,星系与宇宙学重点实验室,上海,200030;中国科学院,研究生院,北京,100049 2. 中国科学院,上海天文台,星系与宇宙学重点实验室,上海,200030;上海市星系与宇宙学半解析重点实验室,上海,200234 3. 中国科学院,上海天文台,星系与宇宙学重点实验室,上海,200030 |
| 基金项目： | 国家自然科学基金，创新群体项目，科技部973项目 |
| 摘 要： | 红团簇巨星(red clump giant)是正处于中心氦燃烧阶段的小质量恒星,它们在赫罗图上成团出现且光度弥散很小,因此很容易被辨认出来。理论和观测研究均表明它们具有大致相同的光度,某些波段的光度与金属丰度以及年龄的关系很微弱,可以作为理想的"标准烛光"来测量天体的距离。依巴谷(Hipparcos)天体测量卫星的数据释放后,红团簇巨星被广泛地用于研究银河系结构以及测定本星系群成员的距离。 |
| 关 键 词： | 红团簇巨星 绝对星等 标准烛光 |
Absolute Magnitude of the Red Clump and its Applications in Distance Determination |
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| GAO Xin-hua,CHEN Li,HOU Jin-liang,ZHAO Jun-liang.Absolute Magnitude of the Red Clump and its Applications in Distance Determination[J].Progress In Astronomy,2011,29(1):31-45. | |
| Authors: | GAO Xin-hua CHEN Li HOU Jin-liang ZHAO Jun-liang |
| Institution: | GAO Xin-hua~(1,2),CHEN Li~(1,3),HOU Jin-liang~1,ZHAO Jun-liang~1 (1.Key Laboratory for Research in Galaxies and Cosmology,Shanghai Astronomical Observatory,Chinese Academy of Sciences,Shanghai 200030,China,2.Graduate University of Chinese Academy of Sciences,Beijing 100049,3.Key Laboratory for Research,Shanghai 200234,China) |
| Abstract: | Red clump giants are intermediate-age core helium-burning stars.Theoretical models predict that their luminosities weakly depends on their age and chemical composition.Small variance in intrinsic luminosities and weakly dependence on chemical composition and age make them an extremely useful distance indicators. Accurate parallaxes for several hundred red clump giants in the solar neighborhood provided by Hipparcos satellite have been used to estimate the mean absolute I-band and K-band magnitudes. Several ... |
| Keywords: | red clump giant absolute magnitude standard candle |
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