Far UV spectroscopy of the circumstellar environment of the Herbig Be stars HD 259431 and HD 250550

摘要

We present an analysis of FUSE spectra of HD 259431 and HD 250550, two Herbig Be stars, which reveals large amounts of circumstellar (CS) gas. Although favouring the flared disk scenario, our results do not rule out the possibility that we actually detect CS envelopes/halos around these stars.