Description: 光譜類型為 "M" 的恆星。天文學家通過光譜中是否存在分子吸收帶（主要來自鈦氧化物）來識別 M 型星。它們的典型（有效）溫度大約在 2500 K 到 3700 K 之間。與其他恆星相比，它們在人眼中呈現紅色。光譜類型為 M 的主序星被稱為紅矮星。M型星也可以是紅巨星或紅超巨星；這些類型的恆星大多是 M 型星，但也包括一些 K 型星以及一些具有強烈的碳光譜特徵的更奇特的恆星類型。獵戶座的參宿四就是一顆 M 型超巨星。

Related Terms:

• 主序
• 分子
• 紅矮星
• 紅巨星
• 紅超巨星
• 光譜類型
• 光譜
• 紅化
• 有效溫度
• 光度等級

Term and definition status: The original definition of this term in English have been approved by a research astronomer and a teacher
The translation of this term and its definition is still awaiting approval

This is an automated transliteration of the simplified Chinese translation of this term

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