A radial velocity study of XY Leonis

Details A radial velocity study of XY Leonis A radial velocity study of XY Leonis

Oct 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...285..683h&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 285, Oct. 15, 1984, p. 683-687. Research supported by the Natural Sciences

Astronomy and Astrophysics

Astrophysics

25

Eclipsing Binary Stars, Radial Velocity, Stellar Spectra, Stellar Spectrophotometry, Velocity Measurement, Astrometry, Cross Correlation, Light Curve, Mass Ratios

Scientific paper

Spectra have been obtained over the past three seasons for the short-period (Od.28) contact binary XY Leo. Exposure times were kept short by the use of an image tube. By cross correlating the blended stellar spectra of this system with spectra of velocity standards of similar spectral type, accurate component velocities were measured. Corrections for tidal and eclipse effects were then investigated based upon a model of the system. With these corrections, the following spectroscopic elements were determined: K1 = 108 + or - 2 km/s, K2 = 216 + or - 4 km/s, and Vo = -50 + or - 2 km/s, which lead to q = 0.50 + or - 0.02, M1 = 0.87 + or - 0.04 solar mass, and M2 = 0.44 + or - 0.02 solar mass. Strong Ca II H and K emission was observed at all phases.

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