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Does Magnetic Flux Submerge at Flux Cancelation Sites?

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Abstract

Simultaneous measurements of the magnetic fields in the photosphere and chromosphere were used to investigate if magnetic flux is submerging at sites between adjacent opposite polarity magnetic network elements in which the flux is observed to decrease or `cancel'. These data were compared with chromospheric and coronal intensity images to establish the timing of the emission structures associated with these magnetic structures as a function of height. We found that most of the cancelation sites show either that the bipole is observed longer in the photosphere than in the chromosphere and corona (44%) or that the timing difference of the disappearance of the bipole between these levels of the atmosphere is unresolved. The magnetic axis lengths of the structures associated with the cancelation sites are on average slightly smaller in the chromosphere than the photosphere. These observations suggest that magnetic flux is retracting below the surface for most, if not all, of the cancelation sites studied.

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Authors and Affiliations

  1. Solar Physics Research Corporation, 4720 Calle Desecada, Tucson, AZ, 85718, U.S.A

    Karen L. Harvey

  2. NASA Goddard Space Flight Center, Laboratory for Astronomy and Solar Physics, USA

    Harrison P. Jones

  3. Lockheed Martin Solar Astrophysics Laboratory, Org. L9-41, Bldg. 252, 3251 Hanover Street, Palo Alto, CA, 94304, U.S.A

    Carolus J. Schrijver

  4. Department of Physics and Astronomy, California State University, Northridge

    Matthew J. Penn

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  1. Karen L. Harvey
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  2. Harrison P. Jones
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  3. Carolus J. Schrijver
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  4. Matthew J. Penn
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Harvey, K.L., Jones, H.P., Schrijver, C.J. et al. Does Magnetic Flux Submerge at Flux Cancelation Sites?. Sol Phys 190, 35–44 (1999). https://doi.org/10.1023/A:1005237719407

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