| 翻訳と辞書 |
| Beta Columbae ： ウィキペディア英語版 |
Beta Columbae
Beta Columbae (β Columbae, β Col) is the second brightest star in the southern constellation of Columba.〔 It has the traditional name Wezn (or ''Wazn''), from the Arabic وزن "weight".〔〔 It has an apparent visual magnitude of 3.1,〔 which is bright enough to be viewed with the naked eye even from an urban location. Parallax measurements place it at a distance of about from Earth.〔
In Chinese, (), meaning ''Son'', refers to an asterism consisting of β Columbae and λ Columbae.〔 ''中國星座神話'', written by 陳久金. Published by 台灣書房出版有限公司, 2005, ISBN 978-986-7332-25-7.〕 Consequently, β Columbae itself is known as (, (英語:the Second Star of Son).)〔 (香港太空館 - 研究資源 - 亮星中英對照表 ), Hong Kong Space Museum. Accessed on line November 23, 2010.〕
==Properties==
The spectrum of Beta Columbae matches a stellar classification of K1 IIICN+1,〔 where the 'III' luminosity class indicates this is a giant star that has exhausted the supply of hydrogen at its core and evolved away from the main sequence of stars like the Sun. The notation 'CN+1' indicates a higher than normal level of cyanogen (CN) absorption in the atmosphere of the star.〔 The interferometry-measured angular diameter of this star, after correcting for limb darkening, is ,〔 which, at its estimated distance, equates to a physical radius of about 11.5 times the radius of the Sun.〔 Despite having expanded to this radius, Beta Columbae only has about a 10% greater mass than the Sun.〔 The outer envelope of this star is radiating energy at an effective temperature of 4,545 K,〔 resulting an orange hue that is typical of a cool, K-type star.〔
Beta Columbae has a high proper motion across the celestial sphere〔 and is moving at an unusually large speed of relative to the Sun.〔 About 107,200 years ago, it made a close approach to the Beta Pictoris system. The estimated separation of the two stars at this time was around and Beta Columbae may have perturbed outlying planetesimals within the debris disk surrounding Beta Pictoris.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
■ウィキペディアで「Beta Columbae」の詳細全文を読む
スポンサード リンク
| 翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|