A new study of the spectroscopic binary 7 Vul with a Be star primary
P. Harmanec,
J. Lipták,
P. Koubský
et al.
Abstract:We confirmed the binary nature of the Be star 7 Vul, derived a more accurate spectroscopic orbit with an orbital period of 69 d .4212 ± 0 d .0034, and improved the knowledge of the basic physical elements of the system. Analyzing available photometry and the strength of the Hα emission, we also document the long-term spectral variations of the Be primary. In addition, we confirmed rapid light changes with a period of 0 d .5592, which is comparable to the expected rotational period of the Be primary, but note t… Show more
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