H-alpha variability in HR 1099 and other RS CVn stars

Details H-alpha variability in HR 1099 and other RS CVn stars H-alpha variability in HR 1099 and other RS CVn stars

Aug 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980aj.....85.1086n&link_type=abstract

Astronomical Journal, vol. 85, Aug. 1980, p. 1086-1091.

Other

17

Binary Stars, H Alpha Line, Stellar Spectrophotometry, Variable Stars, Emission Spectra, Orbital Elements, Spectral Line Width, Variability

Scientific paper

Observations of the RS CVn stars HR 1099, UX Ari, HD 224085, AR Lac, and SZ Psc have been carried out with a CCD detector at KPNO to study the variability of the Hα line. The Hα equivalent width in HR 1099 is shown to undergo a modulation over the orbital period of this spectroscopic binary with the modulation being in antiphase with the photometric distortion wave of the system. Profile and/or intensity variations of Ha with time scales of a few days are also demonstrated for the other systems studied here.

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