High Angular Resolution Interferometric Observations of Betelgeuse in the Visible
Abstract
A new high angular resolution interferometric technique, based on pupil plane observation and rotation shearing of the wavefront, has been developed in the authors' laboratory and compares favorably with speckle interferometry. A two-dimensional map of the visibility of the fringes produced by Betelgeuse has been obtained from data recorded at the C.F.H. telescope on November 30, 1980, in the continuum at λ = 5348 Å. The map (C. Roddier and F. Roddier, 1983) shows evidence for departure from circular symmetry. It has been interpreted as produced by a stellar disk surrounded with an irregular envelope. The authors present here an attempt to reconstruct an image from these data.
- Publication:
-
Mass Loss from Red Giants
- Pub Date:
- July 1985
- DOI:
- 10.1007/978-94-009-5428-1_6
- Bibcode:
- 1985ASSL..117...63R
- Keywords:
-
- Astronomical Maps;
- Interferometry;
- Limb Darkening;
- Red Giant Stars;
- Stellar Envelopes;
- Angular Resolution;
- Image Reconstruction;
- Irradiance;
- Astronomy