MM Herculis - an eclipsing binary of the RS CVn

Details MM Herculis - an eclipsing binary of the RS CVn MM Herculis - an eclipsing binary of the RS CVn

Feb 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983ap%26ss..90..421s&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 90, no. 2, Feb. 1983, p. 421-435. Research supported by the Research Corp.

Astronomy and Astrophysics

Astrophysics

14

Eclipsing Binary Stars, Light Curve, Stellar Spectrophotometry, Ubv Spectra, Variable Stars, Amplitude Distribution Analysis, Electrophotometry, Fourier Analysis, Minima, Radii, Stellar Color, Stellar Mass, Stellar Spectra

Scientific paper

V, B and U differential photoelectric photometry has been obtained for the RS Canum Venaticorum-class eclipsing binary star MM Her, with the light outside the eclipse being Fourier-analyzed to study wave migration and amplitude. These, together with the mean light level of the system, have been monitored from 1976 through 1980. Observations within the eclipse have revealed eclipses to be partial, rather than total as previously thought. The geometric elements of the presently rectified light curve are forced on the pre-1980 light curves and found to be compatible. With these elements, and previously obtained double line radial velocity curves, new absolute dimensions of 1.18 solar masses and 1.58 solar radii are calculated for the hotter star and 1.27 solar masses and 2.83 solar radii for the cooler star. The plotting of color indices on the color-color curve indicates G2V and K2IV spectral types.

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