Multiperiodicity of ζOphiuchi from Multisite Observations

摘要

We present results from simultaneous multisite high-resolution spectroscopic and photometric observations of ζOph (HD 149757) taken in 1993 May. Our spectroscopic data include about 100 hr of continuous monitoring of the star. The line-profile variations of He I λ6678, which are charac -terized by features traveling from blue to red, are well reproduced by two large-amplitude sinusoids and other sinusoids with smaller amplitudes.