The spectral variations of AC Herculis

Details The spectral variations of AC Herculis The spectral variations of AC Herculis

Dec 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26as...54..379m&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 54, Dec. 1983, p. 379-385. Research supported by the Consigl

Astronomy and Astrophysics

Astrophysics

5

Late Stars, Multivariate Statistical Analysis, Spectrum Analysis, Stellar Luminosity, Stellar Spectra, Supergiant Stars, Variable Stars, Data Processing, Tables (Data)

Scientific paper

Low dispersion spectra were taken in order to study the spectral variations of the RV Tau star AC Her. They cover a complete cycle of light variations. The results are discussed also in connection with the visual light variations. As the spectra of AC Her are very entangled, the multivariate data analysis method of correspondences has been applied to them. This method has proved to be very effective in extracting information from data that are affected by several factors and that generally have a low signal to noise ratio.

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