...Spectra show signs of hydrogen deficiency only when the hydrogen content is less than 1/10 5 of the normal value. One example is HD 30353, a supergiant with an A5 temperature, but with a hydrogen content of 1/10 5 of the normal value and a tendency towards an excess of heavy metals. R Coronae Borealis has an F temperature, and is not only deficient in hydrogen but also extremely rich in carbon. ... *Some of the terminology that mentions "HD30353" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…スペクトルに水素欠乏の兆候が現れるのは水素の含有量が正常値の1/105以下の場合に限られる。HD30353という星はその一例で,A5型相当の温度をもつ超巨星であるが,その水素含有量は正常値の1/105で,金属は重いものが過多の傾向を示す。かんむり座R星はF型相当の温度をもち,水素が少ないだけでなく炭素がきわめて過多である。… ※「HD30353」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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