WR 20a: A massive cornerstone binary system comprising two extreme early-type stars
| Authors |
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| Publication date | 2004 |
| Journal | Astronomy & Astrophysics |
| Volume | Issue number | 420 |
| Pages (from-to) | L9-L13 |
| Organisations |
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| Abstract | We analyse spectroscopic observations of WR 20a revealing that this star is a massive early-type binary system with a most probable orbital period of ~3.675 days. Our spectra indicate that both components are most likely of WN6ha or O3If*/WN6ha spectral type. The orbital solution for a period of 3.675 days yields extremely large minimum masses of 70.7 ± 4.0 and 68.8 ± 3.8 M⊙ for the two stars. These properties make WR 20a a cornerstone system for the study of massive star evolution. |
| Document type | Article |
| Language | English |
| Published at | https://doi.org/10.1051/0004-6361:20040150 |
| Published at | http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2004A%26A...420L...9R&db_key=AST&high=3ed1d2904228539 |
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