Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008arep...52..656t&link_type=abstract
Astronomy Reports, Volume 52, Issue 8, pp.656-665
Astronomy and Astrophysics
Astronomy
97.80.Fk, 97.30.Eh, 97.10.Me, 97.20.Ec, 97.60.Lf
Scientific paper
We have analyzed the evolution of the components of the unique massive binary system WR 20a, which consists of a Wolf-Rayet nitrogen star and an Of star with an extremely small separation. The estimated masses of the components are 83 and 82 M &sun;, which are among the highest stellar mass inferred. We have carried out numerical modeling of the evolution of the components, taking into account the mass loss due to the stellar wind inherent to massive stars. In a scenario in which the systemis detached from the time the components reach the main sequence until its present state, the initial component masses are inferred to be close to 110 M &sun;, if the initial masses of the stars were equal, or 120 and 100 M &sun;, if they were different. Currently, the components are evolved main-sequence stars, whose surfaces are relatively little enriched by helium. The further evolution of the system will result in one of the components filling its Roche lobe and evolution within a common envelope. As a result, the components may coalesce, leading to the formation of a single massive black hole the supernova explosion. Otherwise, depending on the masses of the resulting black holes, either a binary system with two black holes or two free black holes will be formed. In the latter case, gamma-ray bursts will be observed.
Cherepashchuk Anatol M.
Fedorova Alexandra V.
Tutukov Aleksandr V.
No associations
LandOfFree
Evolution of the components of the close binary WR 20a does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Evolution of the components of the close binary WR 20a, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evolution of the components of the close binary WR 20a will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1173903