Validating Time‐Distance Far‐Side Imaging of Solar Active Regions through Numerical Simulations

The Virtual Solar Observatory (VSO) concept outlines a software environment for searching, obtaining and analyzing data from archives of solar data that are distributed at many different observatories around the world (Hill 2006, in this volume). The VSO, however, not only provides fast and reliable access to the existing data of Solar Active Regions, but also represents a powerful and unique tool to perform numerical simulations of the evolution and present state of solar phenomena. Two centers at UNAM, the Institute of Astronomy (IA) and the Supercomputer Center (DGSCA), along with the Sonora University, are working together to create the Mexican Virtual Solar Observatory (MVSO) that will be part of a wider national effort.

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Numerical Simulations of the Evolution of Solar Active Regions: the Complex AR12565 and AR12567

Advances in Astrophysics ◽

10.22606/adap.2017.22005 ◽

2017 ◽

Vol 2 (2) ◽

Author(s):

Cristiana Dumitrache ◽

Keyword(s):

Numerical Simulations ◽

Active Regions ◽

Solar Active Regions

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Numerical simulations of conversion to Alfvén waves in solar active regions

Journal of Physics Conference Series ◽

10.1088/1742-6596/271/1/012042 ◽

2011 ◽

Vol 271 ◽

pp. 012042 ◽

Cited By ~ 18

Author(s):

E Khomenko ◽

P S Cally

Keyword(s):

Numerical Simulations ◽

Active Regions ◽

Alfven Waves ◽

Alfvén Waves ◽

Solar Active Regions

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MODELING STATISTICAL PROPERTIES OF SOLAR ACTIVE REGIONS THROUGH DIRECT NUMERICAL SIMULATIONS OF 3D-MHD TURBULENCE

The Astrophysical Journal ◽

10.1088/0004-637x/774/1/84 ◽

2013 ◽

Vol 774 (1) ◽

pp. 84 ◽

Cited By ~ 4

Author(s):

Shiva Kumar Malapaka ◽

Wolf-Christian Müller

Keyword(s):

Numerical Simulations ◽

Active Regions ◽

Direct Numerical Simulations ◽

Statistical Properties ◽

Mhd Turbulence ◽

Solar Active Regions

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Radio Measurements of Coronal Magnetic Fields

International Astronomical Union Colloquium ◽

10.1017/s0252921100024933 ◽

1994 ◽

Vol 144 ◽

pp. 21-28 ◽

Cited By ~ 4

Author(s):

G. B. Gelfreikh

Keyword(s):

Magnetic Field ◽

Magnetic Fields ◽

Solar Corona ◽

Active Regions ◽

High Sensitivity ◽

Coronal Magnetic Field ◽

Transverse Magnetic ◽

Radio Sources ◽

Radio Waves ◽

Solar Active Regions

AbstractA review of methods of measuring magnetic fields in the solar corona using spectral-polarization observations at microwaves with high spatial resolution is presented. The methods are based on the theory of thermal bremsstrahlung, thermal cyclotron emission, propagation of radio waves in quasi-transverse magnetic field and Faraday rotation of the plane of polarization. The most explicit program of measurements of magnetic fields in the atmosphere of solar active regions has been carried out using radio observations performed on the large reflector radio telescope of the Russian Academy of Sciences — RATAN-600. This proved possible due to good wavelength coverage, multichannel spectrographs observations and high sensitivity to polarization of the instrument. Besides direct measurements of the strength of the magnetic fields in some cases the peculiar parameters of radio sources, such as very steep spectra and high brightness temperatures provide some information on a very complicated local structure of the coronal magnetic field. Of special interest are the results found from combined RATAN-600 and large antennas of aperture synthesis (VLA and WSRT), the latter giving more detailed information on twodimensional structure of radio sources. The bulk of the data obtained allows us to investigate themagnetospheresof the solar active regions as the space in the solar corona where the structures and physical processes are controlled both by the photospheric/underphotospheric currents and surrounding “quiet” corona.

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