Two-dimensional images of Alpha Orionis

Details Two-dimensional images of Alpha Orionis Two-dimensional images of Alpha Orionis

Oct 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...309..745h&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 309, Oct. 15, 1986, p. 745-754.

Astronomy and Astrophysics

Astrophysics

20

Image Processing, M Stars, Red Giant Stars, Supergiant Stars, Fourier Transformation, Image Reconstruction, Interferometry, Weighting Functions

Scientific paper

Between February 1981 and December 1983 a series of speckle interferometric observations were made of the M-type supergiant Alpha Orionis in an attempt to produce two-dimensional images of the star at the H-alpha line. Two types of data reduction techniques were used: (1) shift-and-add methods applied to conventional speckle interferometric observations, and (2) differential speckle interferometry. Data analysis included the application of the CLEAN algorithm to calibrate the images produced by the shift-and-add technique with data reduced similarly for a point source. The images produced are encouragingly consistent in suggesting asymmetric atmospheric structure; possible evolution of that structure over the three-year period of observations is noted.

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