Abstract
view Abstract Citations (88) References (20) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Survey of Halpha emission in V711 Tau (HR 1099) and related Ca II emission binaries. Bopp, B. W. ; Talcott, J. C. Abstract We report the results of a survey of V7 11 Tau (HR 1099), UX Ari, and 26 other RS CVn and Ca II emission binaries for Ha emission. A total of six stars show Ha continuously or sporadically in emission while the remainder show pure absorption profiles at 1-A resolution. Observations of UX Ari during 19761977 indicate that the equivalent width (EW) of the emission is correlated with the orbital phase with maximum strength occurring near = O .6. At this same epoch, Hall found the phase of photometric minimum to be O .8 in late 1976 moving to 0 .7 in early 1977. Another RS CVn binary, V71 1 Tau, has been observed for three years and intensively during two major radio flares. Though Ha is enhanced by a factor of two to three during radio outbursts, the EW in HR 1099 is not correlated with orbital phase and no long-term variations are apparent. Four stars show sporadic emission: HD 86590, HK Lac, AR Lac, and SZ Psc. Publication: The Astronomical Journal Pub Date: December 1978 DOI: 10.1086/112355 Bibcode: 1978AJ.....83.1517B Keywords: Binary Stars; Calcium; Emission Spectra; H Alpha Line; K Lines; Radio Stars; Stellar Spectra; Line Spectra; Stellar Spectrophotometry; Astrophysics; Emission Lines:RS CVn Binaries; H Alpha:RS CVn Binaries full text sources ADS | data products SIMBAD (29)
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
