UV survey of δ Scuti stars: Final results and open problems |
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| Authors: | Laura E Pasinetti Fracassini Livio Pastori |
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| Institution: | (1) Dipartimento di Fisica, Universita' degli Sudi di Milano, Via G. celoria 16, I-20133 Milano, Italia;(2) Osservatorio Astronomico di Brera, Via E. Bianchi 46, I-22055 Merate, Italia |
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| Abstract: | The results obtained from our IUE observations of some  Scuti stars and in particular 71 Tau and 69 Tau are reviewed. 71 Tau is the second brightest X-ray source of the Hyades cluster; on the contrary 69 Tau, very similar to 71 Tau in the optical range, does not show X emissions. The complex and in somewhat controversial scenario obtained from this survey is also discussed. In particular we consider the X-ray emission detected in some Scuti with respect to the chromospheric activity level as measured through the MgII line and to other stellar parameters. |
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