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Gamma Aquilae : ウィキペディア英語版
Gamma Aquilae


Gamma Aquilae (γ Aql, γ Aquilae) is a star in the constellation Aquila. It has the traditional name Tarazed.〔 This star has an apparent visual magnitude of 2.712,〔 so it is readily visible to the naked eye at night. Parallax measurements place it at a distance of from Earth.〔
==Properties==

Gamma Aquilae is a relatively young star with an age of about 100 million years. Nevertheless, it has reached a stage of its evolution where it has consumed the hydrogen at its core and expanded into what is termed a bright giant star, with a stellar classification of K3 II.〔 The star is now burning helium into carbon in its core. After it has finished generating energy through nuclear fusion, Gamma Aquilae will become a white dwarf.〔
The interferometry-measured angular diameter of Gamma Aquilae is  mas,〔 which, at its estimated distance, equates to a physical radius of about 95 times the radius of the Sun.〔 With almost six times the Sun's mass, this is an enormous star that is radiating over times the luminosity of the Sun.〔 An effective temperature of in its outer envelope gives it the orange hue typical of K-type stars.〔〔

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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