{"title":"Determination of the Abundance of Mercury from the Hg ii Line at 5677.10 Å in Late B-type Stars. IV. HD 149121 (28 Her) and HD 178065","authors":"Richard Monier","doi":"10.3847/2515-5172/ad5f95","DOIUrl":null,"url":null,"abstract":"The weak line of Hg <sc>ii</sc> located at 5677.10 Å is used to measure the mercury abundance in two HgMn stars, HD 149121 (28 Her) and HD 178065. This line is detected at 3<italic toggle=\"yes\">σ</italic> above the noise in the adjacent continuum in both stars. The synthesis of this line confirms a large overabundance of mercury, about +4.57 dex in HD 149121, and +3.70 dex in HD 178065, which is less than the excesses derived from the 3983.93 Å line in earlier studies. The presence of previously reported weak emission lines of Ti <sc>ii</sc> at 6106.50 Å and of Cr <sc>ii</sc> at 6158.62 and 6182.30 Å in the spectrum of HD 178065 is confirmed. The synthesis of other lines close to the Hg <sc>ii</sc> line yields estimates of the abundance deficiencies or excesses relative to solar abundances. Oxygen has a solar abundance (0.00 dex), silicon is deficient (−0.48 dex), iron also (−0.22 dex) and chromium is overabundant in HD 178065.","PeriodicalId":74684,"journal":{"name":"Research notes of the AAS","volume":"36 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Research notes of the AAS","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.3847/2515-5172/ad5f95","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
The weak line of Hg ii located at 5677.10 Å is used to measure the mercury abundance in two HgMn stars, HD 149121 (28 Her) and HD 178065. This line is detected at 3σ above the noise in the adjacent continuum in both stars. The synthesis of this line confirms a large overabundance of mercury, about +4.57 dex in HD 149121, and +3.70 dex in HD 178065, which is less than the excesses derived from the 3983.93 Å line in earlier studies. The presence of previously reported weak emission lines of Ti ii at 6106.50 Å and of Cr ii at 6158.62 and 6182.30 Å in the spectrum of HD 178065 is confirmed. The synthesis of other lines close to the Hg ii line yields estimates of the abundance deficiencies or excesses relative to solar abundances. Oxygen has a solar abundance (0.00 dex), silicon is deficient (−0.48 dex), iron also (−0.22 dex) and chromium is overabundant in HD 178065.
通过 B 型晚期恒星中位于 5677.10 Å 处的 Hg ii 线确定汞的丰度。IV.HD 149121 (28 Her) 和 HD 178065
位于 5677.10 Å 的 Hg ii 弱线被用来测量两颗 HgMn 星--HD 149121（28 Her）和 HD 178065 的汞丰度。在这两颗恒星中检测到的这条线比邻近连续波的噪声高出 3σ。这条线的合成证实了汞的大量过剩，在 HD 149121 中约为 +4.57 dex，在 HD 178065 中约为 +3.70 dex，低于早期研究中从 3983.93 Å 线得出的过剩量。之前报告的位于 6106.50 Å 的 Ti ii 和位于 6158.62 和 6182.30 Å 的 Cr ii 的微弱发射线在 HD 178065 的光谱中的存在得到了证实。通过对靠近 Hg ii 线的其他线的综合分析，可以估算出相对于太阳丰度的丰度不足或过剩情况。在 HD 178065 中，氧的丰度为太阳丰度（0.00 dex），硅不足（-0.48 dex），铁也是如此（-0.22 dex），而铬则过剩。
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
