Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...124..256b&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 124, no. 2, Aug. 1983, p. 256-266. Research supported by the Swiss National Sc
Astronomy and Astrophysics
Astrophysics
48
Binary Stars, F Stars, Radial Velocity, Supergiant Stars, Main Sequence Stars, Mass Transfer, Orbital Elements, Red Giant Stars, Stellar Spectrophotometry
Scientific paper
Nineteen spectroscopic binaries (SBs) have been discovered in radial velocity measurements made with the CORAVEL spectrophotometer on 181 northern F-M supergiants. The rate of detected SBs among northern F-M supergiants is 21 percent, without any dependence on spectral or luminosity class. The study of the binary F-M supergiants with known orbital elements indicates that all the systems with a period smaller than the critical value P(circ) have a nearly circular orbit. The value of P(circ) depends on the luminosity class, being 400-600 d for class Ib and 2000-7000 d for class Ia. This circularization of the orbits may be due to the transfer of angular momentum during the phase of binary mass exchange.
Burki Gilbert
Mayor Marcel
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