Interferometric Observations of Vega

Details Interferometric Observations of Vega Interferometric Observations of Vega

Dec 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aas...197.4503c&link_type=abstract

American Astronomical Society, 197th AAS Meeting, #45.03; Bulletin of the American Astronomical Society, Vol. 32, p.1476

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We present H (1.65 μ m) and K (2.2 μ m)sub-AU angular size measurements for Vega obtained at the Palomar Testbed Interferometer (PTI). These data are part of a long term observational program using PTI to characterize the sub-AU morphology of Vega-like stars. The mean infrared angular diameter of Vega is measured to be 3.28+/-0.06 milliarcseconds. Known flux and distance estimates, coupled with mean angular size, yield values for the effective temperature and linear radius of 9600+/-130 K and 2.74+/-0.05 solar radii, respectively. The Vega data show no apparent dependence upon wavelength or position angle, from which we infer upper limits on the the dust shell or disk that is expected to surround the primary.

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