The spectroscopic orbit of epsilon Coronae Austrinae: an evolved W Ursae Majoris system

Details The spectroscopic orbit of epsilon Coronae Austrinae: an evolved W Ursae Majoris system The spectroscopic orbit of epsilon Coronae Austrinae: an evolved W Ursae Majoris system

Nov 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...278..463g&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 278, no. 2, p. 463-466

Astronomy and Astrophysics

Astrophysics

11

Eccentricity, Eclipsing Binary Stars, Main Sequence Stars, Orbital Elements, Stellar Orbits, Atmospheric Density, Cross Correlation, Radial Velocity, Spectrographs, Stellar Spectrophotometry, Telescopes

Scientific paper

55 photographic high dispersion spectra of the A-type W UMa binary epsilon CrA were analyzed by a cross-correlation technique. The secondary component could be detected for the first time. The orbital elements are gamma = 57.9 +/- 1.2 km/s, k1 = 34.5 +/- 2.2 km/s, and k2 = 266.9 +/- 2.5 km/s. The masses are m1 = 1.71 +/- 0.04 solar mass, m2 = 0.22 +/- 0.02 solar mass, the mass ratio is q = 0.128 +/- 0.014, epsilon CrA is a W UMa system on the terminal-age main sequence at a distance of 30 +/- 2 pc.

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