Abstract
High spatial (2”) and spectral (7 km s–1) resolution observations of the ring nebula surrounding the LBV star AG Carinae are presented. The data, covering Hα and [NII], were obtained with the UCL echelle spectrograph on the AAT and cover 4 radial slit positions centred on AG Car. The nebular motions are clearly resolved and show that it is a single shell expanding at 70 km s–1 which was ejected from the central star some 7 000 years ago. The data also reveal the presence of a high velocity (~ 83 km s–1) bipolar mass outflow which has distorted the northeastern back edge of the shell.
Publisher
Cambridge University Press (CUP)