Academic Journal
A dusty veil shading Betelgeuse during its Great Dimming
| العنوان: | A dusty veil shading Betelgeuse during its Great Dimming |
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| المؤلفون: | Montargès, M., Cannon, E., Lagadec, E., de Koter, A., Kervella, P., Sanchez-Bermudez, J., Paladini, C., Cantalloube, F., Decin, L., Scicluna, P., Kravchenko, K., Dupree, A.K., Ridgway, S., Wittkowski, M., Anugu, N., Norris, R., Rau, G., Perrin, G., Chiavassa, A., Kraus, S., Monnier, J. D., Millour, F., Le Bouquin, J.-B., Haubois, X., Lopez, B., Stee, P., Danchi, W. |
| المصدر: | Montargès , M , Cannon , E , Lagadec , E , de Koter , A , Kervella , P , Sanchez-Bermudez , J , Paladini , C , Cantalloube , F , Decin , L , Scicluna , P , Kravchenko , K , Dupree , A K , Ridgway , S , Wittkowski , M , Anugu , N , Norris , R , Rau , G , Perrin , G , Chiavassa , A , Kraus , S , Monnier , J D , Millour , F , Le Bouquin , J-B , Haubois , X .... |
| سنة النشر: | 2021 |
| المجموعة: | Universiteit van Amsterdam: Digital Academic Repository (UvA DARE) |
| الوصف: | Red supergiants are the most common final evolutionary stage of stars that have initial masses between 8 and 35 times that of the Sun 1 . During this stage, which lasts roughly 100,000 years 1 , red supergiants experience substantial mass loss. However, the mechanism for this mass loss is unknown 2 . Mass loss may affect the evolutionary path, collapse and future supernova light curve 3 of a red supergiant, and its ultimate fate as either a neutron star or a black hole 4 . From November 2019 to March 2020, Betelgeuse—the second-closest red supergiant to Earth (roughly 220 parsecs, or 724 light years, away) 5,6 —experienced a historic dimming of its visible brightness. Usually having an apparent magnitude between 0.1 and 1.0, its visual brightness decreased to 1.614 ± 0.008 magnitudes around 7–13 February 2020 7 —an event referred to as Betelgeuse’s Great Dimming. Here we report high-angular-resolution observations showing that the southern hemisphere of Betelgeuse was ten times darker than usual in the visible spectrum during its Great Dimming. Observations and modelling support a scenario in which a dust clump formed recently in the vicinity of the star, owing to a local temperature decrease in a cool patch that appeared on the photosphere. The directly imaged brightness variations of Betelgeuse evolved on a timescale of weeks. Our findings suggest that a component of mass loss from red supergiants 8 is inhomogeneous, linked to a very contrasted and rapidly changing photosphere. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| Relation: | https://dare.uva.nl/personal/pure/en/publications/a-dusty-veil-shading-betelgeuse-during-its-great-dimming(6f05605b-4475-4601-ab69-9b84d62b11d2).html |
| DOI: | 10.1038/s41586-021-03546-8 |
| الاتاحة: | https://dare.uva.nl/personal/pure/en/publications/a-dusty-veil-shading-betelgeuse-during-its-great-dimming(6f05605b-4475-4601-ab69-9b84d62b11d2).html https://doi.org/10.1038/s41586-021-03546-8 https://hdl.handle.net/11245.1/6f05605b-4475-4601-ab69-9b84d62b11d2 https://pure.uva.nl/ws/files/68152422/2201.10551 https://ui.adsabs.harvard.edu/abs/2021Natur.594.365M/abstract https://arxiv.org/abs/2201.10551 |
| Rights: | info:eu-repo/semantics/closedAccess |
| رقم الانضمام: | edsbas.9354A98D |
| قاعدة البيانات: | BASE |
| DOI: | 10.1038/s41586-021-03546-8 |
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