Physics
Scientific paper
Jan 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976soph...46...73w&link_type=abstract
Solar Physics, vol. 46, Jan. 1976, p. 73-91. NSF-supported research.
Physics
42
Convective Flow, Magnetic Flux, Magnetic Signatures, Photodiodes, Solar Granulation, Solar Magnetic Field, Calibrating, Magnetic Measurement, Solar Arrays, Velocity Distribution
Scientific paper
The evolution of the velocity and magnetic fields associated with supergranulation has been investigated with a diode array magnetograph. The observations consist of time sequences of simultaneous velocity, magnetic-field, and chromospheric-network measurements. From these data, it appears that the supergranular velocity cells may have lifetimes in excess of the accepted value of 24 hours. Magnetic-field motions associated with supergranulation were infrequent and seem to be accompanied by changes in the velocity field. More prevalent were the slow dissipation and diffusion of stationary flux points. Vertical velocity fields of 200 m/s appear to be confined to downflows in magnetic-field regions at supergranular boundaries. These downflows are only observed in certain absorption lines. Corresponding upflows in the center of supergranules of less than 50 m/s may be present but cannot be confirmed.
Simon George W.
Worden Simon P.
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