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Zeta Cassiopeiae : ウィキペディア英語版 | Zeta Cassiopeiae
Zeta Cassiopeiae (ζ Cas, ζ Cassiopeiae) is a star in the constellation Cassiopeia. It has a blue-white hue and is classified as a B-type subgiant with an apparent magnitude of +3.66. It is approximately 590 light years from Earth. ζ Cas is a probable member of an unusual group of variable stars known as "Slowly Pulsating B" (SPB) stars.〔 It shows a pulsation frequency of 0.64 per day (or once every 1.56 days) and displays a weak magnetic field with a strength of roughly , which varies with a period of 5.37 days.〔 This likely matches the rotation rate of the star, which, when combined with the low projected rotational velocity, indicates the star may be seen nearly pole-on. Zeta Cassiopeiae is a candidate magnetic Bp star that shows an overabundance of helium. The star contains a randomly oriented fossil magnetic field, which impacts the outflow of the stellar wind. Collisions between streams from this stellar wind creates a shock front, with cooling particles settling toward a co-rotating disk.〔 ==Chinese name== In Chinese astronomy, Zeta Cassiopeiae is called 附路, Pinyin: Fùlù, meaning '' 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「Zeta Cassiopeiae」の詳細全文を読む
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