{"title":"哈勃太空望远镜对银河系球状星团的紫外线遗产调查","authors":"F. Lucertini, D. Nardiello, G. Piotto","doi":"10.1051/0004-6361/202039441","DOIUrl":null,"url":null,"abstract":"Aims. We present a new technique to estimate the relative ages of multiple stellar populations hosted by five globular clusters: NGC 104 (47 Tuc), NGC 6121 (M4), NGC 6352, NGC 6362 and NGC 6723. Methods. We used the catalogs of the database \"HST UV Globular cluster Survey (HUGS)\" to create color-magnitude and two-color diagrams of the Globular Clusters. We identified the multiple populations within each globular cluster, and we divided them into two main stellar populations: POPa or first generation (1G) and POPb, composed of all the successive generations of stars. The new technique allows us to obtain an accurate estimate of the relative ages between POPa and POPb. Results. The multiple populations of NGC 104 and NGC 6121 are coeval within 220 Myr and 214 Myr, while those of NGC 6352, NGC 6362 and NGC 6723 are coeval within 336 Myr, 474 Myr and 634 Myr, respectively. These results were obtained combining all the sources of uncertainties.","PeriodicalId":8493,"journal":{"name":"arXiv: Solar and Stellar Astrophysics","volume":"73 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2020-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"9","resultStr":"{\"title\":\"The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters\",\"authors\":\"F. Lucertini, D. Nardiello, G. Piotto\",\"doi\":\"10.1051/0004-6361/202039441\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Aims. We present a new technique to estimate the relative ages of multiple stellar populations hosted by five globular clusters: NGC 104 (47 Tuc), NGC 6121 (M4), NGC 6352, NGC 6362 and NGC 6723. Methods. We used the catalogs of the database \\\"HST UV Globular cluster Survey (HUGS)\\\" to create color-magnitude and two-color diagrams of the Globular Clusters. We identified the multiple populations within each globular cluster, and we divided them into two main stellar populations: POPa or first generation (1G) and POPb, composed of all the successive generations of stars. The new technique allows us to obtain an accurate estimate of the relative ages between POPa and POPb. Results. The multiple populations of NGC 104 and NGC 6121 are coeval within 220 Myr and 214 Myr, while those of NGC 6352, NGC 6362 and NGC 6723 are coeval within 336 Myr, 474 Myr and 634 Myr, respectively. These results were obtained combining all the sources of uncertainties.\",\"PeriodicalId\":8493,\"journal\":{\"name\":\"arXiv: Solar and Stellar Astrophysics\",\"volume\":\"73 1\",\"pages\":\"\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2020-12-11\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"9\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"arXiv: Solar and Stellar Astrophysics\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1051/0004-6361/202039441\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"arXiv: Solar and Stellar Astrophysics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1051/0004-6361/202039441","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 9
摘要
目标我们提出了一种新的技术来估计五个球状星团:NGC 104 (47 Tuc)， NGC 6121 (M4)， NGC 6352, NGC 6362和NGC 6723所拥有的多个恒星群的相对年龄。方法。我们使用“HST紫外球状星团调查(HUGS)”数据库的目录来创建球状星团的彩色、星等和双色图。我们确定了每个球状星团内的多个恒星群，并将它们分为两个主要恒星群:POPa或第一代(1G)和POPb，由所有连续几代恒星组成。这项新技术使我们能够准确地估计出POPa和POPb之间的相对年龄。结果。NGC 104和NGC 6121在220 Myr和214 Myr范围内具有相同的种群，NGC 6352、NGC 6362和NGC 6723分别在336 Myr、474 Myr和634 Myr范围内具有相同的种群。这些结果是综合了所有不确定度的来源得到的。
The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters
Aims. We present a new technique to estimate the relative ages of multiple stellar populations hosted by five globular clusters: NGC 104 (47 Tuc), NGC 6121 (M4), NGC 6352, NGC 6362 and NGC 6723. Methods. We used the catalogs of the database "HST UV Globular cluster Survey (HUGS)" to create color-magnitude and two-color diagrams of the Globular Clusters. We identified the multiple populations within each globular cluster, and we divided them into two main stellar populations: POPa or first generation (1G) and POPb, composed of all the successive generations of stars. The new technique allows us to obtain an accurate estimate of the relative ages between POPa and POPb. Results. The multiple populations of NGC 104 and NGC 6121 are coeval within 220 Myr and 214 Myr, while those of NGC 6352, NGC 6362 and NGC 6723 are coeval within 336 Myr, 474 Myr and 634 Myr, respectively. These results were obtained combining all the sources of uncertainties.
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