Evidence for a third component in the U CrB system

Details Evidence for a third component in the U CrB system Evidence for a third component in the U CrB system

Jun 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26as...48..457v&link_type=abstract

Astronomy and Astrophysics Supplement Series, vol. 48, June 1982, p. 457-480.

Astronomy and Astrophysics

Astrophysics

2

Eccentric Orbits, Eclipsing Binary Stars, Stellar Motions, Apsides, Astrometry, Light Curve, Mass Transfer, Secular Variations, Stellar Rotation, Stellar Spectrophotometry

Scientific paper

Evidence is found for the presence of a third component orbiting the eclipsing binary U CrB in a highly eccentric 75-year orbit, through the analysis of differences between observed and predicted times of minima over the period 1870-1975. In addition to disproving the explanation of the O-C curve in terms of apsidal rotation, a quasi-periodic, impulsive mass transfer mechanism apparently supported by spectroscopic data is shown to have contradictory results. Possibilities for the photometric, astrometric or spectroscopic confirmation of the postulated third component are discussed.

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