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单词 Color magnitude diagram
释义

Color magnitude diagram

中文百科

赫罗图 Hertzsprung–Russell diagram

(重定向自Color magnitude diagram)
赫罗图

赫罗图Hertzsprung-Russel diagram,简写为H-R diagram)是丹麦天文学家赫茨普龙及由美国天文学家罗素分别于1911年和1913年各自独立提出的。后来的研究发现,这张图是研究恒星演化的重要工具,因此把这样一张图以当时两位天文学家的名字来命名,称为赫罗图。赫罗图是恒星的光谱类型与光度之关系图,赫罗图的纵轴是光度与绝对星等,而横轴则是光谱类型及恒星的表面温度,从左向右递减。恒星的光谱型通常可大致分为O.B.A.F.G.K.M七种,要记住这七个类型有一个简单的英文口诀"Oh be A Fine Girl/Guy. Kiss Me!"

英语百科

Hertzsprung–Russell diagram 赫罗图

(重定向自Color magnitude diagram)
Hertzsprung–Russell diagram with 22,000 stars plotted from the Hipparcos Catalogue and 1,000 from the Gliese Catalogue of nearby stars. Stars tend to fall only into certain regions of the diagram. The most prominent is the diagonal, going from the upper-left (hot and bright) to the lower-right (cooler and less bright), called the main sequence. In the lower-left is where white dwarfs are found, and above the main sequence are the subgiants, giants and supergiants. The Sun is found on the main sequence at luminosity 1 (absolute magnitude 4.8) and B−V color index 0.66 (temperature 5780 K, spectral type G2V).
An HR diagram showing many well known stars in the Milky Way galaxy.
HR diagrams for two open clusters, M67 and NGC 188, showing the main-sequence turn-off at different ages.
An HR diagram with the instability strip and its components highlighted.

The Hertzsprung–Russell diagram, abbreviated H–R diagram or HRD, is a scatter graph of stars showing the relationship between the stars' absolute magnitudes or luminosities versus their spectral classifications or effective temperatures. More simply, it plots each star on a graph measuring the star's brightness against its temperature (color). It does not map any locations of stars.

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更新时间:2025/6/21 0:23:02