{"title":"用光学长基线干涉测量法观测北半球明亮的o型星的多样性。试点调查结果。","authors":"Cyprien Lanthermann","doi":"10.1051/0004-6361/202245364","DOIUrl":null,"url":null,"abstract":"<p><p>The study of the multiplicity of massive stars gives hints of their formation processes and their evolution path. Optical interferometry is mandatory to fulfill our knowledge of their multiplicity by probing the separation gap between 1 and 50 mas. We demonstrated the capability of the new interferometric instrument MIRC-X, located at the CHARA array, to study a large sample of more than 120 (H < 7.5) O-type stars. We observed 29 O-type star systems, including a couple of systems in average atmospheric conditions around a magnitude of H = 7.5. Out of these 29 systems, we detected 18 companions in 16 different systems, resulting in a multiplicity fraction f <sub><i>m</i></sub> = 16 / 29 = 0.55, and a companion fraction of f <sub><i>c</i></sub> = 18 / 29 = 0.62. We observed for the first time 11 of these detected companions. This study concludes that a large survey on more than 120 Northern O-type stars is possible with MIRC-X.</p>","PeriodicalId":74548,"journal":{"name":"Proceedings of the International Astronomical Union. International Astronomical Union","volume":"672 ","pages":"A6"},"PeriodicalIF":0.0000,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7614368/pdf/EMS152562.pdf","citationCount":"1","resultStr":"{\"title\":\"Multiplicity of Northern bright O-type stars with optical long baseline interferometry. Results of the pilot survey.\",\"authors\":\"Cyprien Lanthermann\",\"doi\":\"10.1051/0004-6361/202245364\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>The study of the multiplicity of massive stars gives hints of their formation processes and their evolution path. Optical interferometry is mandatory to fulfill our knowledge of their multiplicity by probing the separation gap between 1 and 50 mas. We demonstrated the capability of the new interferometric instrument MIRC-X, located at the CHARA array, to study a large sample of more than 120 (H < 7.5) O-type stars. We observed 29 O-type star systems, including a couple of systems in average atmospheric conditions around a magnitude of H = 7.5. Out of these 29 systems, we detected 18 companions in 16 different systems, resulting in a multiplicity fraction f <sub><i>m</i></sub> = 16 / 29 = 0.55, and a companion fraction of f <sub><i>c</i></sub> = 18 / 29 = 0.62. We observed for the first time 11 of these detected companions. This study concludes that a large survey on more than 120 Northern O-type stars is possible with MIRC-X.</p>\",\"PeriodicalId\":74548,\"journal\":{\"name\":\"Proceedings of the International Astronomical Union. International Astronomical Union\",\"volume\":\"672 \",\"pages\":\"A6\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2023-04-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7614368/pdf/EMS152562.pdf\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Proceedings of the International Astronomical Union. International Astronomical Union\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1051/0004-6361/202245364\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings of the International Astronomical Union. International Astronomical Union","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1051/0004-6361/202245364","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1
摘要
对大质量恒星的多样性的研究为它们的形成过程和演化路径提供了线索。光学干涉测量是强制性的,以满足我们的知识,他们的多样性,探测1和50毫秒之间的分离间隙。我们展示了位于CHARA阵列的新型干涉仪器MIRC-X的能力,可以研究超过120颗(H < 7.5) o型恒星的大样本。我们观测到29个o型恒星系统,包括几个平均大气条件下的系统,其星等约为H = 7.5等。在这29个系统中,我们在16个不同的系统中检测到18个同伴,得到多重分数f m = 16 / 29 = 0.55,伴侣分数f c = 18 / 29 = 0.62。我们首次观测到其中的11个伴星。这项研究的结论是,MIRC-X可以对120多颗北方o型恒星进行大规模调查。
Multiplicity of Northern bright O-type stars with optical long baseline interferometry. Results of the pilot survey.
The study of the multiplicity of massive stars gives hints of their formation processes and their evolution path. Optical interferometry is mandatory to fulfill our knowledge of their multiplicity by probing the separation gap between 1 and 50 mas. We demonstrated the capability of the new interferometric instrument MIRC-X, located at the CHARA array, to study a large sample of more than 120 (H < 7.5) O-type stars. We observed 29 O-type star systems, including a couple of systems in average atmospheric conditions around a magnitude of H = 7.5. Out of these 29 systems, we detected 18 companions in 16 different systems, resulting in a multiplicity fraction f m = 16 / 29 = 0.55, and a companion fraction of f c = 18 / 29 = 0.62. We observed for the first time 11 of these detected companions. This study concludes that a large survey on more than 120 Northern O-type stars is possible with MIRC-X.