Seething Horizontal Magnetic Fields in the Quiet Solar Photosphere

Details Seething Horizontal Magnetic Fields in the Quiet Solar Photosphere Seething Horizontal Magnetic Fields in the Quiet Solar Photosphere

2007-02-15

arxiv.org/abs/astro-ph/0702415v1

Astronomy and Astrophysics

Astrophysics

7 pages, 6 figures, submitted to ApJ letters, quality of figures significantly degraded here by compression requirements

Scientific paper

10.1086/518036

The photospheric magnetic field outside of active regions and the network has a ubiquitous and dynamic line-of-sight component that strengthens from disk center to limb as expected for a nearly horizontal orientation. This component shows a striking time variation with an average temporal rms near the limb of 1.7 G at ~3" resolution. In our moderate resolution observations the nearly horizontal component has a frequency variation power law exponent of -1.4 below 1.5 mHz and is spatially patchy on scales up to ~15 arcsec. The field may be a manifestation of changing magnetic connections between eruptions and evolution of small magnetic flux elements in response to convective motions. It shows no detectable latitude or longitude variations.

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