Validation of Two MHD Models of the Solar Corona with Rotational Tomography
We demonstrate a validation of two 3D MHD models of the corona by comparing density values from solar rotational tomography (SRT) to densities and morphological properties of the two MHD solutions for CR 2029 (2005 April 21-May 18). The two MHD models are given by the Stanford and Michigan models, a...
Published in: | The Astrophysical Journal |
---|---|
Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
IOP Publishing
|
Subjects: | |
Online Access: | http://hdl.handle.net/11336/20816 |
id |
ftconicet:oai:ri.conicet.gov.ar:11336/20816 |
---|---|
record_format |
openpolar |
spelling |
ftconicet:oai:ri.conicet.gov.ar:11336/20816 2023-10-09T21:55:59+02:00 Validation of Two MHD Models of the Solar Corona with Rotational Tomography Vasquez, Alberto Marcos Frazin. Richard A. Hayashi, Keiji Sokolov, Igor V. Cohen, Ofer Manchester IV, Ward B. Kamalabadi, Farzad application/pdf http://hdl.handle.net/11336/20816 eng eng IOP Publishing info:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.1086/589682 info:eu-repo/semantics/altIdentifier/doi/10.1086/589682 http://hdl.handle.net/11336/20816 Vasquez, Alberto Marcos; Frazin. Richard A.; Hayashi, Keiji; Sokolov, Igor V.; Cohen, Ofer; et al.; Validation of Two MHD Models of the Solar Corona with Rotational Tomography; IOP Publishing; Astrophysical Journal; 682; 2; 12-2008; 1328-1337 0004-637X CONICET Digital CONICET info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1086/589682 2023-09-24T19:33:18Z We demonstrate a validation of two 3D MHD models of the corona by comparing density values from solar rotational tomography (SRT) to densities and morphological properties of the two MHD solutions for CR 2029 (2005 April 21-May 18). The two MHD models are given by the Stanford and Michigan models, and both use the same synoptic magnetogram from MDI as a lower boundary condition. The SRT reconstructions are based on polarized white-light images MLSO Mk IV data for the region between 1.1 and 1.5 R☉ (solar radii) and LASCO C2 for the region between 2.3 and 6.0 R☉. While the Stanford MHD model reasonably reproduces the tomographic density over the south pole, it fares less well over the north pole, and the Michigan MHD model underestimates the density over both poles. At lower latitudes, we find that while the MHD models have better agreement with the tomographic densities in the region below 3.5 R☉, at larger heights the agreement is more problematic. Our interpretation is that the base densities and temperatures of the models need to be improved, as well as their radial density gradients. Fil: Vasquez, Alberto Marcos. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina Fil: Frazin. Richard A. University of Michigan; Estados Unidos Fil: Hayashi, Keiji. University Of Stanford; Estados Unidos Fil: Sokolov, Igor V. University of Michigan; Estados Unidos Fil: Cohen, Ofer. University of Michigan; Estados Unidos Fil: Manchester IV, Ward B. University of Michigan; Estados Unidos Fil: Kamalabadi, Farzad. University of Illinois; Estados Unidos Article in Journal/Newspaper South pole CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Argentina South Pole North Pole Marcos ENVELOPE(-61.833,-61.833,-64.500,-64.500) The Astrophysical Journal 682 2 1328 1337 |
institution |
Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
spellingShingle |
https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 Vasquez, Alberto Marcos Frazin. Richard A. Hayashi, Keiji Sokolov, Igor V. Cohen, Ofer Manchester IV, Ward B. Kamalabadi, Farzad Validation of Two MHD Models of the Solar Corona with Rotational Tomography |
topic_facet |
https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
description |
We demonstrate a validation of two 3D MHD models of the corona by comparing density values from solar rotational tomography (SRT) to densities and morphological properties of the two MHD solutions for CR 2029 (2005 April 21-May 18). The two MHD models are given by the Stanford and Michigan models, and both use the same synoptic magnetogram from MDI as a lower boundary condition. The SRT reconstructions are based on polarized white-light images MLSO Mk IV data for the region between 1.1 and 1.5 R☉ (solar radii) and LASCO C2 for the region between 2.3 and 6.0 R☉. While the Stanford MHD model reasonably reproduces the tomographic density over the south pole, it fares less well over the north pole, and the Michigan MHD model underestimates the density over both poles. At lower latitudes, we find that while the MHD models have better agreement with the tomographic densities in the region below 3.5 R☉, at larger heights the agreement is more problematic. Our interpretation is that the base densities and temperatures of the models need to be improved, as well as their radial density gradients. Fil: Vasquez, Alberto Marcos. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina Fil: Frazin. Richard A. University of Michigan; Estados Unidos Fil: Hayashi, Keiji. University Of Stanford; Estados Unidos Fil: Sokolov, Igor V. University of Michigan; Estados Unidos Fil: Cohen, Ofer. University of Michigan; Estados Unidos Fil: Manchester IV, Ward B. University of Michigan; Estados Unidos Fil: Kamalabadi, Farzad. University of Illinois; Estados Unidos |
format |
Article in Journal/Newspaper |
author |
Vasquez, Alberto Marcos Frazin. Richard A. Hayashi, Keiji Sokolov, Igor V. Cohen, Ofer Manchester IV, Ward B. Kamalabadi, Farzad |
author_facet |
Vasquez, Alberto Marcos Frazin. Richard A. Hayashi, Keiji Sokolov, Igor V. Cohen, Ofer Manchester IV, Ward B. Kamalabadi, Farzad |
author_sort |
Vasquez, Alberto Marcos |
title |
Validation of Two MHD Models of the Solar Corona with Rotational Tomography |
title_short |
Validation of Two MHD Models of the Solar Corona with Rotational Tomography |
title_full |
Validation of Two MHD Models of the Solar Corona with Rotational Tomography |
title_fullStr |
Validation of Two MHD Models of the Solar Corona with Rotational Tomography |
title_full_unstemmed |
Validation of Two MHD Models of the Solar Corona with Rotational Tomography |
title_sort |
validation of two mhd models of the solar corona with rotational tomography |
publisher |
IOP Publishing |
url |
http://hdl.handle.net/11336/20816 |
long_lat |
ENVELOPE(-61.833,-61.833,-64.500,-64.500) |
geographic |
Argentina South Pole North Pole Marcos |
geographic_facet |
Argentina South Pole North Pole Marcos |
genre |
South pole |
genre_facet |
South pole |
op_relation |
info:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.1086/589682 info:eu-repo/semantics/altIdentifier/doi/10.1086/589682 http://hdl.handle.net/11336/20816 Vasquez, Alberto Marcos; Frazin. Richard A.; Hayashi, Keiji; Sokolov, Igor V.; Cohen, Ofer; et al.; Validation of Two MHD Models of the Solar Corona with Rotational Tomography; IOP Publishing; Astrophysical Journal; 682; 2; 12-2008; 1328-1337 0004-637X CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.1086/589682 |
container_title |
The Astrophysical Journal |
container_volume |
682 |
container_issue |
2 |
container_start_page |
1328 |
op_container_end_page |
1337 |
_version_ |
1779320270606041088 |