Horizontal or vertical magnetic fields on the quiet Sun
نویسندگان
چکیده
منابع مشابه
The Strength of Quiet Sun Magnetic Fields
We present new quantitative measurements of magnetic fields on the quiet Sun. The object was (a) to measure magnetic field strengths, and (b) to test the “kilogauss model,” which posits that the apparently weak fields are actually subtelescopic knots of kilogauss fields with small filling factors. We used a new arrangement we call the spectro-videomagnetograph (SPVMG), which applies the videoma...
متن کاملComparison of transient horizontal magnetic fields in a plage region and in the quiet Sun
Aims. Properties of transient horizontal magnetic fields (THMFs) in both plage and quiet Sun regions are obtained and compared. Methods. Spectro-polarimetric observations with the Solar Optical Telescope (SOT) on the Hinode satellite were carried out with a cadence of about 30 seconds for both plage and quiet regions located near disk center. We select THMFs that have net linear polarization (L...
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Kilogauss-strength magnetic fields are often observed in intergranular lanes at the photosphere in the quiet Sun. Such fields are stronger than the equipartition field Be, corresponding to a magnetic energy density that matches the kinetic energy density of photospheric convection, and comparable with the field Bp that exerts a magnetic pressure equal to the ambient gas pressure. We present an ...
متن کاملEvidence for Non-potential Magnetic Fields in the Quiet Sun
A comparison of BBSO H centerline ltergrams and videomagnetograms was made to investigate the existence of non-potential magnetic elds in the quiet Sun near magnetic network. We use the bril structure in the H images as a proxy for the horizontal chromospheric magnetic eld which we compare with the horizontal eld obtained by potential extrapolation of the observed, line-of-sight photospheric el...
متن کاملSeething Horizontal Magnetic Fields in the Quiet Solar Photosphere
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 ...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2013
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/201321608