Eccentric Orbits in Samples of Circularized Binary Systems: The Fingerprint of a Third Star

Details Eccentric Orbits in Samples of Circularized Binary Systems: The Fingerprint of a Third Star Eccentric Orbits in Samples of Circularized Binary Systems: The Fingerprint of a Third Star

Feb 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990aj.....99..675m&link_type=abstract

Astronomical Journal v.99, p.675

Astronomy and Astrophysics

Astronomy

49

Stars: Binaries

Scientific paper

Three short-period binaries, whose orbits should have been circularized long ago, have been found with small eccentricities. The eccentricities are attributed to a third star, which can modulate the binary eccentricity with a relatively long timescale. It is shown that strong spectroscopic indications for the existence of a third star have already been observed in all three systems. The frequency of close binaries with another distant companion is discussed; some evidence is presented that about half of the spectroscopic binaries are in fact triple systems.

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