Back to Search
Start Over
Red Supergiants, Luminous Blue Variables and Wolf-Rayet stars: the single massive star perspective
- Source :
- Societe Royale des Sciences de Liege p. 266-278 (Proceedings of the 39th Liege Astrophysical Colloquium, held in Li\`ege 12-16 July 2010, edited by G. Rauw, M. De Becker, Y. Naz\'e, J.-M. Vreux, P. Williams), Bulletin de la Societe Royale des Sciences de Liege, NASA Astrophysics Data System
-
Abstract
- We discuss, in the context of the single star scenario, the nature of the progenitors of Red Supergiants (RSG), of Luminous Blue Variables (LBV) and of Wolf-Rayet (WR) stars. These three different populations correspond to evolved phases of Main Sequence (MS) OB stars. Axial rotation and mass loss have a great influence on massive star evolution in general and more specifically on the durations of these different phases. Moderate rotation and mass loss, during the MS phase, favor the evolution towards the RSG stage. Fast rotation and strong mass loss during the MS phase, in contrast, prevent the star from becoming a RSG and allow the star to pass directly from the OB star phase into the WR phase. Mass loss during the RSG stage may make the star evolve back in the blue part of the HR diagram. We argue that such an evolution may be more common than presently accounted for in stellar models. This might be the reason for the lack of type IIP SNe with RSG progenitors having initial masses between 18 and 30 M$_\odot$. The LBVs do appear as a possible transition phase between O and WR stars or between WNL and WNE stars. Fast rotation and/or strong mass loss during the Main-Sequence phase prevent the formation of LBV stars. The mechanisms driving the very strong ejections shown by LBV stars are still unknown. (abridged)<br />Comment: 12 pages, 6 figures
- Subjects :
- astro-ph.SR
Astrophysics - Solar and Stellar Astrophysics
FOS: Physical sciences
Astrophysics::Solar and Stellar Astrophysics
Astrophysics::Earth and Planetary Astrophysics
Astrophysics::Cosmology and Extragalactic Astrophysics
Solar and Stellar Astrophysics (astro-ph.SR)
Astrophysics::Galaxy Astrophysics
QB
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Societe Royale des Sciences de Liege p. 266-278 (Proceedings of the 39th Liege Astrophysical Colloquium, held in Li\`ege 12-16 July 2010, edited by G. Rauw, M. De Becker, Y. Naz\'e, J.-M. Vreux, P. Williams), Bulletin de la Societe Royale des Sciences de Liege, NASA Astrophysics Data System
- Accession number :
- edsair.doi.dedup.....be259a4537b6d68f9bf6943387b8b986