Exploring the nature and synchronicity of early cluster formation in the Large Magellanic Cloud - V. Multiple populations in ancient globular clusters
| العنوان: | Exploring the nature and synchronicity of early cluster formation in the Large Magellanic Cloud - V. Multiple populations in ancient globular clusters |
|---|---|
| المؤلفون: | Sandro Villanova, Ata Sarajedini, Aaron J. Grocholski, C. K. Gilligan, M. C. Parisi, Douglas Geisler, Dougal Mackey, Paolo Ventura, Soung-Chul Yang, Roger E. Cohen, Brian Chaboyer, Jeffrey D. Cummings, R. Wagner-Kaiser |
| المصدر: | CONICET Digital (CONICET) Consejo Nacional de Investigaciones Científicas y Técnicas instacron:CONICET |
| بيانات النشر: | Wiley Blackwell Publishing, Inc, 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Physics, education.field_of_study, 010308 nuclear & particles physics, Population, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, purl.org/becyt/ford/1.3 [https], Horizontal branch, Astrophysics - Astrophysics of Galaxies, 01 natural sciences, Advanced Camera for Surveys, Red-giant branch, purl.org/becyt/ford/1 [https], Space and Planetary Science, Globular cluster, Astrophysics of Galaxies (astro-ph.GA), MAGELLANIC CLOUDS, 0103 physical sciences, STAR CLUSTERS: INDIVIDUAL: (NGC 1466, NGC 1841, NGC 2257, RETICULUM) [GALAXIES], education, Large Magellanic Cloud, 010303 astronomy & astrophysics, Wide Field Camera 3, Main sequence |
| الوصف: | We examine four ancient Large Magellanic Cloud (LMC) globular clusters (GCs) for evidence of multiple stellar populations using the Advanced Camera for Surveys and Wide Field Camera 3 on the Hubble Space Telescope Programme GO-14164. NGC 1466, NGC 1841, and NGC 2257 all show evidence for a redder, secondary population along the main-sequence. Reticulum does not show evidence for the presence of a redder population, but this GC has the least number of stars and Monte Carlo simulations indicate that the sample of main sequence stars is too small to robustly infer whether a redder population exists in this cluster. The second, redder, population of the other three clusters constitutes $\sim30-40\%$ of the total population along the main-sequence. This brings the total number of ancient LMC GCs with known split or broadened main-sequences to five. However, unlike for Hodge 11 and NGC 2210 (see arXiv:1904.01434), none of the clusters show evidence for multiple populations in the horizontal branch. We also do not find evidence of a second population along the Red Giant Branch (RGB). Comment: Accepted in MNRAS |
| وصف الملف: | application/pdf |
| اللغة: | English |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a55e922b013f0b9291b3581f670dcc9dTest https://academic.oup.com/mnras/article/494/2/1946/5813272Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....a55e922b013f0b9291b3581f670dcc9d |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |