An Ab Initio Approach to the Solar Coronal Heating Problem

2005 ◽  
Vol 618 (2) ◽  
pp. 1020-1030 ◽  
Author(s):  
Boris Vilhelm Gudiksen ◽  
Ake Nordlund
Keyword(s):  
Ab Initio ◽  
Coronal Heating ◽  
Ab Initio Approach ◽  
Solar Coronal

Erratum: “An AB Initio Approach to Solar Coronal Loops” (ApJ, 618, 1031 [2005])

2005 ◽  
Vol 623 (1) ◽  
pp. 597-599
Author(s):  
Boris Vilhelm Gudiksen ◽  
Ake Nordlund
Keyword(s):  
Ab Initio ◽  
Coronal Loops ◽  
Ab Initio Approach ◽  
Solar Coronal

scholarly journals An AB Initio Approach to Solar Coronal Loops

2005 ◽  
Vol 618 (2) ◽  
pp. 1031-1038 ◽  
Author(s):  
Boris Vilhelm Gudiksen ◽  
Ake Nordlund
Keyword(s):  
Ab Initio ◽  
Coronal Loops ◽  
Ab Initio Approach ◽  
Solar Coronal

An Ab Initio Approach to the Solar Coronal Heating Problem

2004 ◽  
Vol 219 ◽  
pp. 488-492 ◽  
Author(s):  
B.V. Gudiksen ◽  
Â. Nordlund
Keyword(s):  
Magnetic Field ◽  
Solar Corona ◽  
Ab Initio ◽  
Coronal Heating ◽  
Dissipated Energy ◽  
Large Temperature ◽  
Heating Process ◽  
Solar Photosphere ◽  
The Magnetic Field ◽  
Solar Coronal

We approach the solar coronal heating problem ab initio. Starting from a potential extrapolation of a SOHO/MDI magnetogram, a FAL—C atmospheric stratification, and a realistic photospheric velocity field, Spitzer conductivity and magnetic dissipation creates a corona where more than 2 106ergs s—1 cm—2 is dissipated. The winding of the magnetic field by the horizontal velocities in the solar photosphere is sufficient to provide a major part of the heating in the solar corona. The heating is intermittent on the smallest scale, but on average follows the magnetic field strength squared, as is expected from a force free magnetic field configuration. The intermittent heating creates large temperature and density fluctuations in the corona. The total dissipated energy in the corona is at least constant if not increasing with magnetic Reynolds number, making this heating process unavoidable as a major contributor to the heating of the solar corona.

Solar coronal heating by magnetosonic waves

2001 ◽  
Vol 326 (2) ◽  
pp. 675-685 ◽  
Author(s):  
E.R. Pekünlü ◽  
Ö. Çakırlı ◽  
E. Özetken
Keyword(s):  
Coronal Heating ◽  
Solar Coronal

scholarly journals Structure and Raman scattering of chained carbon films on copper substrate: ab initio approach

2018 ◽  
Vol 292 ◽  
pp. 012102 ◽  
Author(s):  
E A Buntov ◽  
A F Zatsepin ◽  
M B Guseva ◽  
D A Boqizoda ◽  
B L Oksengendler
Keyword(s):  
Raman Scattering ◽  
Ab Initio ◽  
Copper Substrate ◽  
Carbon Films ◽  
Ab Initio Approach

Simulation of Local Surface Modification in STM by ab initio Quantum Chemistry

1998 ◽  
Vol 05 (02) ◽  
pp. 493-499 ◽  
Author(s):  
V. S. Gurin
Keyword(s):  
Surface Modification ◽  
Ab Initio ◽  
Physical Nature ◽  
Atomic Scale ◽  
Level Shift ◽  
Electrical Field ◽  
High Electrical Field ◽  
Wide Range ◽  
Energy Level Shift ◽  
Ab Initio Approach

Surface modification by means of STM has became a well-known method for the artificial formation of nanometer and atomic scale structures. The physical nature of surface modification can consist in a wide range of phenomena (from mechanical indentation up to specific tip-induced chemistry). The high electrical field at the STM tip is considered to be the main feature of STM modification experiments. The field strength is comparable with intramolecular ones and can influence the chemical bonding in surface structures. The model of STM-stimulated modification is considered using the quantum-chemical ab initio approach for a surface cluster in the high electrical field. The destabilization effect, energy level shift, and bond polarization under the STM tip field occur and can show the atomistic nature of surface transformations in STM.

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