The Abundance of Chlorine in the Atmosphere of HD 87240

Roméo Veyry and Richard Monier
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Abstract

High resolution high signal-to-noise UVES spectra of the late B-type chemically peculiar star, HD 87240, a member of the NGC 3114 open cluster, have been synthesized to measure the abundance of chlorine, an element which is rarely found in late B-type stars. Sixteen lines of Cl ii are found and the mean chlorine overabundance is about 2.1 dex higher than the solar abundance, which is slightly lower than the chlorine excess in HR 1094, another chlorine-rich late B-type star.
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HD 87240大气层中氯的丰度
我们合成了 NGC 3114 开放星团中的一颗晚 B 型化学奇特恒星 HD 87240 的高分辨率、高信噪比紫外可见光谱,以测量氯元素的丰度。发现了16条Cl ii线,平均氯过量比太阳丰度高出约2.1 dex,略低于另一颗富含氯的晚B型恒星HR 1094的氯过量。
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