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Subsurface flows associated with rotating sunspots
Sun helioseismology, Sun interior, (Sun) sunspots
2011/10/19
In this paper, we compare components of the horizontal flow below the solar surface in and around regions consisting of rotating and non-rotating sunspots. Our analysis suggests that there is a signif...
3D numerical MHD modeling of sunspots with radiation transport
MHD – radiative transfer – Sun sunspots – Sun photosphere – Sun magnetic
2010/11/10
Sunspot fine structure has been modeled in the past by a combination of idealized magneto-convection simulations and simplified models that prescribe the magnetic field and flow structure to a large d...
An uncombed inversion of multi-wavelength observations reproducing the Net Circular Polarization in a sunspots' penumbra
Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/28
I derived a geometrical model of the penumbral magnetic field topology from an uncombed inversion setup that aimed at reproducing the NCP of simultaneous spectra in near-IR (1.56 mu) and VIS (630 nm) ...
Supersonic Downflows at the Umbra-Penumbra Boundary of Sunspots
Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/23
High resolution spectropolarimetric observations of 3 sunspots taken with {\em Hinode} demonstrate the existence of supersonic downflows at or close to the umbra-penumbra boundary which have not been ...
Determining Absorption, Emissivity Reduction, and Local Suppression Coefficients inside Sunspots
Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/23
The power of solar acoustic waves is reduced inside sunspots mainly due to absorption, emissivity reduction, and local suppression. The coefficients of these power-reduction mechanisms can be determin...
The Flares Associated with the Dynamics of the Sunspots
Sunspots rotation magnetic flux magnetic reconnection
2010/9/16
In the present study, we consider six years data of spot groups that have well developed leading and following spots obtained from the Kodaikanal Observatory white light pictures and occurrence of Hα ...
A theory of the Earth's magnetic field and of sunspots,based on a self-excited dynamo incorporating the Hall effect
Earth's magnetic field self-excited dynamo Hall effect
2009/11/12
A new viewpoint on the generation and maintenance of the Earth's magnetic field is put forward, which integrates self-exciting dynamo theory with the possibility of energy coupling along orthogonal ax...
Clarification of the Hall effect as an energy transfer mechanism in a theory of the Earth’s magnetic field and sunspots
Hall effect energy transfer mechanism Earth’s magnetic field and sunspots
2009/11/12
Clarification is offered of the energy transfer role played by the Hall effect in a recent paper: de Paor, A., A theory of the Earth's magnetic field and of sunspots, based on a self-excited dynamo in...
Small-scale Magnetic Field Diagnostics outside Sunspots：Comparison of Different Methods
Sun magnetic fluxtubes kG magnetic fields
2009/5/12
We analyse different observational data related to the problem
of intrinsic magnetic field strength in small-scale fluxtubes outside
sunspots. We conclude that the kG range of fluxtube fields follow...
The Flares Associated with the Dynamics of the Sunspots
Sunspots rotation magnetic flux magnetic reconnection
2009/5/7
In the present study, we consider six years data of spot groups that have well developed leading and following spots obtained from the Kodaikanal Observatory white light pictures and occurrence of H...