Orbital characteristics of the subdwarf-B and F V star binary EC 20117-4014(=V4640 SGR)
Among the competing evolution theories for subdwarf-B (sdB) stars is the binary evolution scenario. EC 20117-4014 (=V4640 Sgr) is a spectroscopic binary system consisting of a pulsating sdB star and a late F main-sequence companion (O’Donoghue et al. 1997), however the period and the orbit semi-majo...
| Main Authors: | , , , , , , |
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| Format: | Journal article |
| Published: |
American Astronomical Society
2018
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