Evidence for non-potential magnetic fields in the quiet Sun

Document Type

Article

Publication Date

1-1-1999

Abstract

A comparison of BBSO Hα centerline filtergrams and videomagnetograms was made to investigate the existence of non-potential magnetic fields in the quiet Sun near magnetic network. We use the fibril structure in the Hα images as a proxy for the horizontal chromospheric magnetic field which we compare with the horizontal field obtained by potential extrapolation of the observed, line-of-sight photospheric field. The quiet-Sun field was found to be consistently and significantly non-potential in each of the three fields of view studied. A transient extreme ultraviolet (EUV) brightening, known as a blinker, occurred during the observations of a region where the field is highly non-potential, suggesting a connection between magnetic reconnection and non-potentiality.

Identifier

0033432543 (Scopus)

Publication Title

Solar Physics

External Full Text Location

https://doi.org/10.1023/A:1005088232234

ISSN

00380938

First Page

239

Last Page

247

Issue

2

Volume

184

Grant

ATM 97–14796

Fund Ref

National Science Foundation

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