HST-GHRS observations of α Piscis Austrini. Evidence of no gas content in the circumstellar environment.
Deleuil, M.; Ferlet, R.; Vidal-Madjar, A.; Lallement, R.; Lecavelier Des Etangs, A.; Bertin, P.; Lagrange-Henri, A. -M.
France
Abstract
The origin of the gaseous disk around the star β Pictoris is still unclear. A way to progress is to search for gas signatures in the environment of other stars presenting known IR excesses as initially discovered with the IRAS satellite. Recently, Cheng et al. (1994) reported the possible detection of circumstellar gas absorptions in the spectrum of α PsA from IUE archival data. Here, we present observations done in the same line of sight with the GHRS on board the Space Telescope. No circumstellar absorption lines are observed. The implications of such a non detection are briefly discussed.