The mean magnetic field of the sun - Observations at Stanford

Details The mean magnetic field of the sun - Observations at Stanford The mean magnetic field of the sun - Observations at Stanford

Oct 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977soph...54..353s&link_type=abstract

Solar Physics, vol. 54, Oct. 1977, p. 353-361. Research supported by the Max C. Fleischmann Foundation

Physics

58

Magnetic Signatures, Solar Instruments, Solar Magnetic Field, Telescopes, Geomagnetism, Interplanetary Magnetic Fields, Polarity, Spectroheliographs

Scientific paper

A solar telescope has been built to study the organization and evolution of large-scale solar magnetic fields and velocities. The observations are made using a Babcock-type magnetograph connected to a 22.9-m vertical Littrow spectrograph. Sun-as-a-star integrated-light measurements of the mean solar magnetic field have been made daily since May 1975. The typical mean-field magnitude has been about 0.15 G, with a typical measurement error of less than 0.05 G. The mean-field polarity pattern is essentially identical to the interplanetary-magnetic-field sector structure (seen near earth with a four-day lag). The differences in the observed structures can be understood in terms of a 'warped current sheet' model.

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