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Proceedings Paper

Aperture masking interferometry on the Keck I Telescope: new results from the diffraction limit
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Paper Abstract

A high-resolution aperture-masking interferometry experiment at the Keck-1 telescope has produced images of stellar systems at diffraction-limited angular resolutions in the near-infrared (tens of milliarcsec). Targeting the dusty cocoons of young stellar objects and the circumstellar shrouds surrounding evolved giants and supergiants, these images have revealed a startling range of morphologies. Evolved stars from massive blue Wolf-Rayets to red giants, supergiants and carbon stars have shown dramatic dust plumes, clumps and shells which can dominate the dust halo, showing that mass loss from these objects can sometimes be anything but smooth and isotropic. The photospheres of a handful of red giants were large enough to be resolved with the 10 m baselines available within the Keck pupil. Stellar diameters were found to vary with pulsation phase and with observing wavelength.

Paper Details

Date Published: 5 July 2000
PDF: 8 pages
Proc. SPIE 4006, Interferometry in Optical Astronomy, (5 July 2000); doi: 10.1117/12.390244
Show Author Affiliations
Peter G. Tuthill, Univ. of Sydney (Australia)
John D. Monnier, Harvard-Smithsonian Astrophysical Ctr. (United States)
William C. Danchi, Nasa Goddard Space Flight Ctr. (United States)

Published in SPIE Proceedings Vol. 4006:
Interferometry in Optical Astronomy
Pierre J. Lena; Andreas Quirrenbach, Editor(s)

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