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Emerging flux in active regions

Liggett, Margaret and Zirin, Harold (1985) Emerging flux in active regions. Solar Physics, 97 (1). pp. 51-58. ISSN 0038-0938. doi:10.1007/bf00152978.

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We have compared the rates at which flux emerges in active and quiet solar regions within the sunspot belts. The emerging flux regions (EFRs) were identified by the appearance of arch filament structures in Hα. All EFRs in high-resolution films of active regions made at Big Bear in 1978 were counted. The comparable rate of flux emergence in quiet regions was obtained from SGD data and independently from EFRs detected outside the active region perimeter on the same films. The rate of flux emergence is 10 times higher in active regions than in quiet regions. A sample of all active regions in 31 days of 1983 gave a ratio of 7.5. We discuss possible mechanisms which might funnel new magnetic flux to regions of strong magnetic field.

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Additional Information:© 1985 Kluwer Academic Publishers. Provided by the NASA Astrophysics Data System. Received 4 July, 1984; in revised form 24 January, 1985. We thank the Big Bear observers, especially for the laborious multi-region imaging in 1983. This work was supported by the NSF under ATM-8211002 and by NASA under NGL 05-002-034.
Funding AgencyGrant Number
NASANGL 05-002-034
Subject Keywords:Magnetic Field; Active Region; Magnetic Flux; Comparable Rate; Strong Magnetic Field
Issue or Number:1
Record Number:CaltechAUTHORS:20200602-131615978
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Official Citation:Liggett, M., Zirin, H. Emerging flux in active regions. Sol Phys 97, 51–58 (1985).
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:103645
Deposited By: Tony Diaz
Deposited On:02 Jun 2020 20:50
Last Modified:16 Nov 2021 18:23

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