Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981mnras.196..797a&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 196, Sept. 1981, p. 797-800.
Astronomy and Astrophysics
Astronomy
20
Dust, Speckle Patterns, Stellar Envelopes, Stellar Structure, Wolf-Rayet Stars, Focal Plane Devices, Infrared Interferometers, Power Spectra, Size Determination, Stellar Models
Scientific paper
Results of a pilot study of infrared speckle interferometry are presented, and observations of two WC 9 stars are reported. A circular focal-plane aperture of diameter 0.085 arcsec was used, slightly in excess of half the expected diffraction disk of a point source at the observing wavelength of 2.2 microns. The seeing disk was scanned across the aperture with a symmetrical triangular waveform of peak-to-peak amplitude 3 arcsec and period 0.5 s. Data are plotted for WC 9 Ve 2-45, which is highly reddened at optical wavelengths. The shell of the circumstellar dust is optically thin, and has a characteristic radius of 0.04 arcsec, which is in agreement with the simple optically-thin dust shell model which was constructed.
Allen David A.
Barton John R.
Wallace Patrick T.
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