Titlebook: Exploring the Universe with the IUE Satellite; Y. Kondo,W. Wamsteker,R. Wilson Book 1987 Springer Science+Business Media Dordrecht 1987 un

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Symbiotic Stars of a starlike object with a spectrum that simultaneously contains cool star features, like TiO molecular bands, and nebular emission lines, like [O .] or more highly ionized features. This suggests the presence of two components: a cool giant star plus a nebula of moderate ionization. The light out

Diastole

Intrinsically Variable Starse discussed (mainly the . Cepheids, W Vir stars and related groups), while the second part deals with late-type variables, mainly the M, S, and C giants and supergiants, hence stars close to and on the Asymptotic Giant Branch (AGB) in the HR diagram. Few of these latter stars appear to be ‘quasi-con

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Chromospheres and Transition RegionsCa . H and K lines and in He . 10 830 ?. While some trends in the properties of stellar chromospheres as a function of spectral type and luminosity (e.g. the Wilson—Bappu effect) were established on the basis of optical data, the field could not advance without observations at shorter wavelengths wh

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Harbor

The Dynamics of Hydraulic Systems,January 26, 1978, it is still operational at the time of writing (end 1986, its ninth year) making it the longest-lived astronomical satellite ever. Although it is now showing some signs of age, its scientific performance is essentially unimpaired; for example, its photometric sensitivity has declin

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