MAGNETIC LOOPS IN 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...
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Aims. We describe a new form of small-scale magnetic flux emergence in the quiet Sun. This process seems to take vertical magnetic fields from the solar interior to the photosphere, where they appear above granular convection cells. Methods. High-cadence time series of spectropolarimetric measurements obtained by Hinode in a quiet region near disk center are analyzed. We extract line parameters...
متن کاملSearch for photospheric footpoints of quiet Sun transition region loops
Context. The footpoints of quiet Sun Transition Region (TR) loops do not seem to coincide with the photospheric magnetic structures appearing in traditional low-sensitivity magnetograms. Aims. To look for the so-far unidentified photospheric footpoints of TR loops using G-band bright points (BPs) as proxies for photospheric magnetic field concentrations. Methods. Comparison of TR measurements w...
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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 کاملSmall-scale Magnetic Reconnection in the Quiet Sun
Recent observations indicate that small-scale magnetic re-connection ubiquitously occurs in the quiet Sun as well as in active regions. Particularly interesting is the latest nding of close associations among (1) magnetic ux cancellation seen from photospheric magne-tograms, (2) chromospheric uppow events seen in the H line and (3) transition region explosive events seen in UV lines. I present ...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2010
ISSN: 2041-8205,2041-8213
DOI: 10.1088/2041-8205/723/2/l185