Titlebook: Be and Shell Stars; Arne Slettebak (Chairman) Book 1976 Springer Science+Business Media Dordrecht 1976 photometry.spectroscopy.star.stella

Endearing

New Observational Data Concerning 4 Her and , Tauentral intensities of both lines vary periodically with the period of velocity changes equal to 46.194 days, reaching two maxima and minima each cycle. Radia-velocity curves of individual Balmer lines differ systematically one from another, the amplitude of the H. variations being largest. The ./. r

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The Surface Gravities of Be Starsring their observed profiles of Hγ and H. with those computed from the Princeton model atmospheres and the VCS theory of hydrogen line broadening. The program stars are predominately well-known Be stars and display a wide range of envelope spectra and . sin .. The mean and range in log . for the Be

Daily-Value

A Comparative Study of the Shell of , Tau and 48 Libity class III. These stars show similar features in the variation of the intensities, the profiles, and the radial velocities of the shell lines. An attempt has been made to explain the evolution of these unstable features.