Multiwavelength images of Alpha Orionis

Details Multiwavelength images of Alpha Orionis Multiwavelength images of Alpha Orionis

Apr 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...327..894c&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 327, April 15, 1988, p. 894-904.

Astronomy and Astrophysics

Astrophysics

16

Cosmic Dust, Image Processing, Lyman Alpha Radiation, Orion Constellation, Red Giant Stars, Stellar Envelopes, Power Spectra, Spatial Resolution, Stellar Luminosity, Supergiant Stars, Telescopes

Scientific paper

The authors have used a recently developed high spatial resolution imaging technique, known as weighted shift-and-add, to obtain diffraction-limited images of the red supergiant α Ori at the resolution of the KPNO Mayall 4 m telescope. Images were obtained at six different bandpasses, and the measured disk diameters agree to within a few percent of the values obtained from the previously published power spectrum and autocorrelation analysis of the same data set. From the major and minor axes of models fitted to the intensity profiles, the authors obtain asymmetry measures of both the disk and envelope components of 4(±2)% and 37(±13)%, respectively. In addition, they have searched for the proposed nearby companion, but the data shows no direct evidence of it suggesting an upper limit of Δm ≈ 4.

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