Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aas...193.8202m&link_type=abstract
American Astronomical Society, 193rd AAS Meeting, #82.02; Bulletin of the American Astronomical Society, Vol. 30, p.1375
Astronomy and Astrophysics
Astronomy
Scientific paper
The Keck-I telescope has been converted into a VLA-style interferometric array using aperture masking techniques, allowing infrared imaging with true diffraction-limited resolution (<60 mas at 2.2 microns). This represents nearly a factor of 3 increase in resolution over most previous observations in the near-IR, sufficient to resolve clumpy, asymmetric mass-loss on the AGB and circumstellar material around Wolf-Rayets and YSOs. Proper motions of dust features are also reported, yielding critical dynamical information and providing new insight into the mass-loss processes of evolved stars. In addition, I will discuss a unique experiment on the 10 micron heterodyne interferometer, the Infrared Spatial Interferometer. An RF filterbank has recently been constructed and installed, allowing interferometry with spectral resolution as high as (lambda )/(Delta lambda ) ~ 5x 10(5) . Application of this technique to studying molecule formation around AGB stars is described, and initial results on IRC +10216 and VY CMa presented.
Bester Manfred
Danchi William C.
Hale David
Lipman E.
Monnier John D.
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