Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...152...25v&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 152, no. 1, Nov. 1985, p. 25-32. Research supported by the University of Flori
Astronomy and Astrophysics
Astrophysics
36
Binary Stars, Stellar Mass, Astronomical Photometry, Astronomical Spectroscopy, Light Curve, Mass Ratios, Radial Velocity, Standard Deviation
Scientific paper
Spectroscopic, photometric, and simultaneous spectroscopic-photometric mass ratios are derived for two well-observed W UMa binaries. For AE Phe, the model includes a spot of slightly augmented temperature which simulates the nonuniform surface brightness produced by luminosity transfer. The proximity and eclipse effects are taken into account for the computed radial velocities. They are found to make a significant mass ratio change for V566 Oph. The radial velocity figures show that these effects are quite large for W UMa binaries. A computationally expensive means is suggested for obtaining useful simultaneous solutions in the presence of systematic effects. Spectroscopic mass ratios could be improved if published velocity curves contained considerably more points than is now common practice.
van Hamme Walter
Wilson Robert E.
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