Digital image reconstruction applied to alpha Orionis

Details Digital image reconstruction applied to alpha Orionis Digital image reconstruction applied to alpha Orionis

Jul 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apj...207..174l&link_type=abstract

Astrophysical Journal, vol. 207, July 1, 1976, pt. 1, p. 174-180.

Astronomy and Astrophysics

Astrophysics

80

Astronomical Photography, Digital Techniques, Optical Data Processing, Spatial Filtering, Supergiant Stars, Diffraction Patterns, Interferometry, Photographic Processing, Signal Processing, Speckle Patterns, Telescopes, Temperature Effects

Scientific paper

Short-exposure photographs at high magnification have been obtained for the M2 Ia-b supergiant alpha Ori with a 4-m telescope. Optical passbands were chosen which isolate a temperature-sensitive TiO band and, for comparison, a nearby section of continuum. The photographs have been digitized and subjected to a deconvolution procedure which gives reconstructed images of the surface of the star. The images indicate a small difference in the angular dimensions of the star as observed through the two different filters, and there is some evidence supporting the presence of surface structure. The particular procedure employed in the reconstruction of the images has only a limited range of validity, but application of the procedure to photographs of the unresolved star gamma Ori not only served the necessary function of determining the final point-spread function but also yielded images showing a diffraction pattern apparently related to the theoretical Airy pattern of the telescope.

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