Evidence for a yellow-supergiant phase of AG Carinae.

Following recent coronographic observations of gas and dust surrounding the Luminous Blue Variable AG Carinae displaying a variety of dynamical structures, we investigate the past evolutionary history of this object on the basis of the standard dynamical model for the interaction of a hot stellar outflow with a slower wind from an earlier evolutionary phase. We show that a continuous mass loss is a most viable mechanism by which the star can produce the observed massive shell of ionized gas and dust.