Astrophysics on the High Frontier of High Resolution

Gerard van Belle
Jet Propulsion Laboratory

The impact of the ground-based interferometry projects at JPL upon basic
astrophysical parameters will be presented.  Specifically, results from the Palomar
Testbed Interferometer will be covered, including: angular diameters of giant and
supergiant stars, and the resulting linear radii and effective temperatures;
determination of orbits for binary stars, and the resultant masses; and dual-star
astrometry at PTI.  All of these results involve spatial resolution at 2.2 microns at
the 0.1 to 10 milliarcsecond level.