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CH stars : ウィキペディア英語版
CH star

CH stars are particular type of carbon stars which are characterized by the presence of exceedingly strong absorption bands due to CH (methylidyne) in their spectra. They belong to the stellar population II, meaning they're metal poor and generally pretty middle-aged stars, and are under-luminous compared to the classical C–N carbon stars. Many CH stars are known to be binaries, and it's reasonable to believe this is the case for all CH stars. Like Barium stars, they are probably the result of a mass transfer from a former classical carbon star, now a white dwarf, to the current CH-classed star.
==External links==

* (【引用サイトリンク】 url = http://www.daviddarling.info/encyclopedia/C/CH_star.html )


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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