The spectrum of Canopus. II - Analysis and composition

Details The spectrum of Canopus. II - Analysis and composition The spectrum of Canopus. II - Analysis and composition

Nov 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982mnras.201..707d&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 201, Nov. 1982, p. 707-721.

Astronomy and Astrophysics

Astronomy

21

Atmospheric Composition, Spectrum Analysis, Stellar Atmospheres, Stellar Spectrophotometry, Supergiant Stars, Abundance, Atmospheric Models, Balmer Series, F Stars, Nitrogen, Solar Atmosphere, Spectral Line Width, Stellar Temperature

Scientific paper

The atmospheric parameters for the F-type supergiant star Canopus are spectrophotometry and Balmer line profile measurements to be an effective temperature of 7350 + or - 30 K, and log g of 1.80 + or 0.05. An absolute model atmosphere analysis of the equivalent widths published by Hearnshaw and Desikachary (1982) is carried out. The abundances are presented for 33 elements, and all have an approximately solar abundance with the possible exception of nitrogen. Some tentative evidence is presented that nitrogen in Canopus may be five times more abundant than in the sun. Depth-dependence of microturbulence was looked for, but not found.

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