Orbits of close binaries with CA II H and K in emission. III - Eleven more systems

Details Orbits of close binaries with CA II H and K in emission. III - Eleven more systems Orbits of close binaries with CA II H and K in emission. III - Eleven more systems

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990aj....100..247p&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 100, July 1990, p. 247-273. Research supported by NSF.

Astronomy and Astrophysics

Astronomy

33

Eclipsing Binary Stars, Emission Spectra, Light Curve, Metallicity, Stellar Orbits, Stellar Spectra, Calcium, D Lines, H Lines, K Lines

Scientific paper

Lick spectrograms have been used to derive spectroscopic orbits for the 11 systems CQ Aur, SS Boo, SS Cam, Ru Cnc, UX Com, RT CrB, AW Her, PW Her, GK Hya, RW UMa, and RS UMi, in order to complete an extended analysis of detached subgiant binaries with H and K emission. Features common to nearly all the systems include UV excesses of the cooler components and anomalies in the surface-flux ratios, which are best understood as flux deficits relative to the fluxes expected from the values of B-V of the cooler components. Spottedness can explain the surface flux anomalies.

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