Ae and A type shell stars
Observatoire de Strasbourg, URA 1280, CNRS, 11 rue de l'Université, 67000 Strasbourg, France
2 Laboratoire d'Astronomie, Université de Montpellier 2, URA 1280 CNRS, place Eugène Bataillon, 34095 Montpellier, Cedex 5, France
Send offprint request to: Y. Andrillat 27 ter r.Adam de Craponne, 34000 Montpellier, France.
Accepted: 26 January 1998
We present and discuss the observations of 14 Ae and A type shell stars in the visual, the Hα region and the near infrared. At least 57% of these stars are spectrum variables. The Paschen lines are formed in a region which has the characterics of giant stars. We find that the systems lie one magnitude above the main sequence and that a large percentage belong to double and triple systems.
Key words: stars: early type; emission line; variables
© European Southern Observatory (ESO), 1998