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R. S. Millan-Gabet, F. P. Schloerb (U. Massachusetts at Amherst), W. A. Traub (Smithsonian Astrophysical Observatory)
Herbig AeBe stars are intermediate mass, pre-main sequence stars, and many of these objects show evidence of circumstellar disks. We present near-infrared, long baseline interferometric observations of a sample of 12 stars obtained at the Infrared Optical Telescope Array (IOTA). The IOTA resolves the circumstellar emission from these systems and allows their properties to be elucidated.
Detailed modelling of the near-IR emission in AB Aur, the prototype for this class, reveals a characteristic size of 0.7 AU, depending on the assumed brightness structure. Preliminary analysis of the 11 other stars show that 9 are resolved by the IOTA. One object, MWC 361, is observed to be a binary system.
The author(s) of this abstract have provided an email address for comments about the abstract: rmillang@comet.phast.umass.edu