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单词 Cepheid Variables
释义

Cepheid Variables

原声例句
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The stars are known as Cepheid variables.

这些恒星就是我们熟知的造父变星。

万物简史

She noticed that a type of star known as a Cepheid variable (after the constellation Cepheus, where it first was identified) pulsated with a regular rhythm-a kind of stellar heartbeat.

她注意到,有一种名叫造父变星(以仙王星座命名,第一颗造父变星就是在那里发现的)的恒星在有节奏地搏动——一种星体的“心跳”。

Crash Course 天文篇

These are called Cepheid variables, and they were critically important, because it was known that the time it took them to pulse was directly related to their luminosity, how much energy they emitted.

这些被称为造父变星,它们非常重要,因为我们知道它们产生脉冲的时间与它们的光度直接相关,也就是它们释放的能量。

中文百科

造父变星 Cepheid variable

(重定向自Cepheid Variables)

造父变星Cepheid英语发音:/ˈsɛfɪd/英语发音:/ˈsfɪd/)的成员是一种非常明亮的变星,其变光的光度和脉动周期有着非常强的直接关联性。造父变星是创建银河和河外星系距离标尺的可靠且重要的标准烛光。

造父变星分成几个子类,表现出截然不同的质量、年龄、和演化历史:经典造父变星、第二型造父变星、异常造父变星、和矮造父变星。

造父变星的名称源自在仙王座的仙王座δ星,在1784年被约翰·古德利克发现是一颗变星。由于是这种类型变星中被确认的第一颗,而它的中文名称是造父一,因此得名。造父一也是验证周光关系时特别重要的一颗造父变星,因为他的距离是造父变星中最精确的,这要归功于它的成员都在星团之中,并且可以从哈伯太空望远镜/依巴谷卫星得到可靠的视差。

英语百科

Cepheid variable

RS Puppis as imaged by Hubble (HST)
Cepheid variables illustration (red dots) at the center of the Milky Way.[7]
Cepheids redirects here. For the fictional species, see "Blind Alley".

A Cepheid variable (/ˈsɛfɪd/ or /ˈsfɪd/) is a type of star that pulsates radially, varying in both temperature and diameter to produce brightness changes with a well-defined stable period and amplitude.

A strong direct relationship between a Cepheid variable's luminosity and pulsation period secures for Cepheids their status as important distance indicators for establishing the galactic and extragalactic distance scales.

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更新时间:2025/6/18 6:13:46