New λ Bootis stars with a shell

¹ Institut d'Astronomie de l'Université de Lausanne, CH-1290 Chavannes-des-Bois, Switzerland
² Observatoire de Paris-Meudon, DASGAL, F-92125 Meudon Principal Cedex, France

Send offprint request to: B. Hauck

Received: 26 February 1997
Accepted: 5 August 1997

Abstract

We publish here the second part of our spectroscopic survey at high dispersion of some known and suspected λ Bootis stars with a view to detecting circumstellar shell features. Eight stars of our sample exhibit such features. These stars are fast rotators, a result which is in line with Hohlweger and Rentzsch-Holm's study (1995). The analysis of the photometric data has allowed us to confirm the exclusion of a few stars misclassified from the λ Bootis group.