The Real-Time Stellar Evolution of Sakurai's Object
| العنوان: | The Real-Time Stellar Evolution of Sakurai's Object |
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| المؤلفون: | Albert A. Zijlstra, José Alberto López, Florian Kerber, A. Evans, Don Pollacco, Stefan Kimeswenger, Falk Herwig, Myfanwy Bryce, Peter A. M. van Hoof, S. P. S. Eyres, Marcin Hajduk, Mikako Matsuura |
| المصدر: | Science. 308:231-233 |
| بيانات النشر: | American Association for the Advancement of Science (AAAS), 2005. |
| سنة النشر: | 2005 |
| مصطلحات موضوعية: | Physics, Multidisciplinary, chemistry, Convective mixing, White dwarf, chemistry.chemical_element, Astrophysics, Giant star, Event (particle physics), Stellar evolution, Galaxy, Mixing (physics), Helium |
| الوصف: | After a hot white dwarf ceases its nuclear burning, its helium may briefly and explosively reignite. This causes the star to evolve back into a cool giant, whereupon it experiences renewed mass ejection before reheating. A reignition event of this kind was observed in 1996 in V4334 Sgr (Sakurai's object). Its temperature decrease was 100 times the predicted rate. To understand its unexpectedly fast evolution, we have developed a model in which convective mixing is strongly suppressed under the influence of flash burning. The model predicts equally rapid reheating of the star. Radio emission from freshly ionized matter now shows that this reheating has begun. Such events may be an important source of carbon and carbonaceous dust in the Galaxy. |
| تدمد: | 1095-9203 0036-8075 |
| DOI: | 10.1126/science.1108953 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::452d5494f4aca75baffd18906b3f2e40 https://doi.org/10.1126/science.1108953 |
| رقم الانضمام: | edsair.doi.dedup.....452d5494f4aca75baffd18906b3f2e40 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 10959203 00368075 |
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| DOI: | 10.1126/science.1108953 |