تقرير
NGC1818 unveils the origin of the extended main-sequence turn-off in young Magellanic Clouds clusters
| العنوان: | NGC1818 unveils the origin of the extended main-sequence turn-off in young Magellanic Clouds clusters |
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| المؤلفون: | Cordoni, Giacomo, Milone, Antonino P., Marino, Anna F., Cignoni, Michele, Lagioia, Edoardo P., Tailo, Marco, Carlos, Marília, Dondoglio, Emanuele, Jang, Sohee, Mohandasan, Anjana, Legnardi, Maria V. |
| المصدر: | Nature Communications, 13, 4325 (2022) |
| سنة النشر: | 2022 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - Solar and Stellar Astrophysics, Astrophysics - Astrophysics of Galaxies |
| الوصف: | The origin of young star clusters represents a major challenge for modern stellar astrophysics. While stellar rotation partially explains the colour spread observed along main-sequence turn-offs, i.e. where stars leave the main-sequence after the exhaustion of hydrogen in their core, and the multiple main sequences in the colour-magnitude diagrams of stellar systems younger than approximately 2 Gyr, it appears that an age difference may still be required to fulfill the observational constraints. Here we introduce an alternative approach that exploits the main-sequence turn-on, i.e. the point alongside the colour-magnitude diagram where pre-main-sequence stars join the main-sequence, to disentangle between the effects of stellar rotation and age to assess the presence, or lack thereof, of prolonged star formation in the approximately 40-Myr-old cluster NGC1818. Our results provide evidence for a fast star formation, confined within 8 Myr, thus excluding age differences as responsible for the extended main-sequence turn-offs, and leading the way to alternative observational perspectives in the exploration of stellar populations in young clusters. Comment: 9 pages, 5 figures, published on Nature Communications DOIhttps://doi.org/10.1038/s41467-022-31977-y |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1038/s41467-022-31977-y |
| URL الوصول: | http://arxiv.org/abs/2208.09467 |
| رقم الأكسشن: | edsarx.2208.09467 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1038/s41467-022-31977-y |
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