Dynamical Phenomena in Sunspots - Part Two - a Moving Magnetic Feature

Details Dynamical Phenomena in Sunspots - Part Two - a Moving Magnetic Feature Dynamical Phenomena in Sunspots - Part Two - a Moving Magnetic Feature

Oct 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...285..381n&link_type=abstract

Astrophysical Journal, Vol.285, NO. 1, P. 381, 1984

Astronomy and Astrophysics

Astrophysics

8

Scientific paper

High-resolution observations of the magnetic field, vertical velocity, and chromospheric intensity in a typical moving magnetic feature (MMF) are obtained over a period of 1 hr as it moves outward across the moat surrounding a large sunspot. The area of the MMF increases and the magnetic field strength decreases as it moves outward. The MMF contains a strong downdraft with a velocity of 400 m s-1 in the photosphere. The lifetime assigned to the MMF depends upon the signature by which it is observed.

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