Other
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...205.5305t&link_type=abstract
American Astronomical Society Meeting 205, #53.05; Bulletin of the American Astronomical Society, Vol. 36, p.1426
Other
Scientific paper
Long-baseline interferometric observations obtained with the Navy Prototype Optical Interferometer of the Hα -emitting envelopes of the Be stars η Tauri and β Canis Minoris are presented. For compatibility with the already published interferometric results in the literature of other Be stars, circularly symmetric and elliptical Gaussian models are fitted to the calibrated observations in Hα . The models are sufficient in describing the overall angular extents of the circumstellar regions associated with these Be stars. To study the correlations between the various model parameters and the stellar characteristics, the model parameters for η Tau and β CMi are combined with data for other Be stars found in the literature. After accounting for the different distances to the sources and stellar continuum flux levels, it is possible to study the relationship between the net Hα emission and the physical extent of the Hα -emitting circumstellar region. A clear dependence of the net Hα emission on the extent of the emitting region is demonstrated and these results are consistent with an optically thick line emission that is directly proportional to the effective area of the emitting disk. Within the small sample of stars considered in this analysis, no clear dependence on the spectral type or stellar rotation is established.
This work was performed in part under funding from the Government of Ontario Graduate Scholarship in Science and Technology and Walter C. Sumner Fellowship, as well as in part under contract with the Jet Propulsion Laboratory (JPL) funded by NASA through the Michelson Fellowship Program. JPL is managed for NASA by the California Institute of Technology.
NPOI Collaboration
Tycner Christopher
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