Other
Scientific paper
Feb 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...236..308v&link_type=abstract
Astrophysical Journal, Part 1, vol. 236, Feb. 15, 1980, p. 308-317.
Other
17
Electrophotometers, Magnetic Stars, Spectrographs, Telescopes, Zeeman Effect, Data Reduction, Long Term Effects, Photodiodes, Polarization Characteristics, Variable Stars
Scientific paper
The paper describes a multichannel photoelectric Zeeman analyzer at the coude spectrograph of the McDonald 2.7 m reflector. A comparison of Lick and McDonald observations of HD 153882 reveals no significant difference in slopes or zero points of the two magnetic fields indicating that the systematic scale difference of 30-40% is probably instrumental in origin. Observations of the magnetic variable beta Cor Bor revealed a more nearly sinusoidal magnetic curve with less internal scatter than the photographically determined field measures of the Lick and Mauna Kea Zeeman systems. Investigation of periodicity in the secularly varying magnetic minima of beta Cor Bor did not yield evidence of previously noted periodicities other than that expected from the time structure of the data sampling.
Kelton Phillip W.
Tull Robert G.
Vogt Stefan
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