{"title":"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。III.HD 145389 (ϕ Her) 和 HD 186122 (46 Aql)","authors":"Richard Monier","doi":"10.3847/2515-5172/ad5a8e","DOIUrl":null,"url":null,"abstract":"The weak line of Hg ii located at 5677.10 Å is used to measure the mercury abundance in two HgMn stars, HD 145389 (ϕ Her) and HD 186122 (46 Aql). This line is detected at 3σ above the noise in the adjacent continuum in ϕ Her but not detected in 46 Aql. The synthesis of this line, using the current atomic parameters available in NIST, confirms a large overabundance of mercury in HD 143807, about 4.08 dex, which is actually smaller than the excess derived from the 3983.93 Å line in earlier studies. The synthesis of other lines close to the Hg ii line yields excesses in scandium (+1.9 dex), chromium (+1.0 dex) and yttrium (+3.34 dex) in ϕ Her.","PeriodicalId":74684,"journal":{"name":"Research notes of the AAS","volume":"209 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Determination of the Abundance of Mercury from the Hg ii Line at 5677.10 Å in Late B-type Stars. III. HD 145389 (ϕ Her) and HD 186122 (46 Aql)\",\"authors\":\"Richard Monier\",\"doi\":\"10.3847/2515-5172/ad5a8e\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The weak line of Hg ii located at 5677.10 Å is used to measure the mercury abundance in two HgMn stars, HD 145389 (ϕ Her) and HD 186122 (46 Aql). This line is detected at 3σ above the noise in the adjacent continuum in ϕ Her but not detected in 46 Aql. The synthesis of this line, using the current atomic parameters available in NIST, confirms a large overabundance of mercury in HD 143807, about 4.08 dex, which is actually smaller than the excess derived from the 3983.93 Å line in earlier studies. The synthesis of other lines close to the Hg ii line yields excesses in scandium (+1.9 dex), chromium (+1.0 dex) and yttrium (+3.34 dex) in ϕ Her.\",\"PeriodicalId\":74684,\"journal\":{\"name\":\"Research notes of the AAS\",\"volume\":\"209 1\",\"pages\":\"\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2024-06-24\",\"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/ad5a8e\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Research notes of the AAS","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.3847/2515-5172/ad5a8e","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
摘要
位于 5677.10 Å 的 Hg ii 弱线被用来测量两颗 HgMn 星--HD 145389（ϕ Her）和 HD 186122（46 Aql）--中的汞丰度。在 ϕ Her 星中，这条线在高于邻近连续谱噪音的 3σ 处被探测到，但在 46 Aql 星中却没有被探测到。利用 NIST 提供的当前原子参数对这条线进行的合成证实，HD 143807 中的汞大量过剩，约为 4.08 dex，这实际上小于早期研究中从 3983.93 Å 线得出的过剩量。通过对靠近 Hg ii 线的其他线进行综合分析，可以得出 ϕ Her 中钪（+1.9 dex）、铬（+1.0 dex）和钇（+3.34 dex）的过量。
Determination of the Abundance of Mercury from the Hg ii Line at 5677.10 Å in Late B-type Stars. III. HD 145389 (ϕ Her) and HD 186122 (46 Aql)
The weak line of Hg ii located at 5677.10 Å is used to measure the mercury abundance in two HgMn stars, HD 145389 (ϕ Her) and HD 186122 (46 Aql). This line is detected at 3σ above the noise in the adjacent continuum in ϕ Her but not detected in 46 Aql. The synthesis of this line, using the current atomic parameters available in NIST, confirms a large overabundance of mercury in HD 143807, about 4.08 dex, which is actually smaller than the excess derived from the 3983.93 Å line in earlier studies. The synthesis of other lines close to the Hg ii line yields excesses in scandium (+1.9 dex), chromium (+1.0 dex) and yttrium (+3.34 dex) in ϕ Her.
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