Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...160..243w&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 160, no. 2, May 1986, p. 243-250. Research supported by the Max-Planck-Institu
Astronomy and Astrophysics
Astrophysics
6
Early Stars, Magnetic Stars, Stellar Magnetic Fields, Supergiant Stars, Circular Polarization, Periodic Variations, Spectrum Analysis, Stellar Evolution, Stellar Spectrophotometry, Zeeman Effect
Scientific paper
Zeeman spectrograms taken at the ESO in 1978 for Canopus (F0 Ib-II) confirm the presence of the weak magnetic field detected by Schermann (1977) and Rakosch et al. (1977), and a new period of 6.90 days for the Canopus magnetic field variation is proposed. It is noted that with the MSHIFT-technique (Weiss et al., 1978) the plate-mean Zeeman shifts can be extracted more accurately than with the classical single line technique, with an increase in the significance level of detection of a variable weak magnetic field in Canopus from about 2.5sigma to 5sigma.
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