NAOC Open IR  > 太阳物理研究部
Magnetic Helicity Estimations in Models and Observations of the Solar Magnetic Field. III. Twist Number Method
Guo, Y.1,2; Pariat, E.3; Valori, G.4; Anfinogentov, S.5; Chen, F.6; Georgoulis, M. K.7; Liu, Y.8; Moraitis, K.3,7; Thalmann, J. K.9; Yang, S.10
2017-05-01
Source PublicationASTROPHYSICAL JOURNAL
Volume840Issue:1
AbstractWe study the writhe, twist, and magnetic helicity of different magnetic flux ropes, based on models of the solar coronal magnetic field structure. These include an analytical force-free Titov-Demoulin equilibrium solution, nonforce-free magnetohydrodynamic simulations, and nonlinear force-free magnetic field models. The geometrical boundary of the magnetic flux rope is determined by the quasi-separatrix layer and the bottom surface, and the axis curve of the flux rope is determined by its overall orientation. The twist is computed by the Berger-Prior formula, which is suitable for arbitrary geometry and both force-free and non-force-free models. The magnetic helicity is estimated by the twist multiplied by the square of the axial magnetic flux. We compare the obtained values with those derived by a finite volume helicity estimation method. We find that the magnetic helicity obtained with the twist method agrees with the helicity carried by the purely current-carrying part of the field within uncertainties for most test cases. It is also found that the current-carrying part of the model field is relatively significant at the very location of the magnetic flux rope. This qualitatively explains the agreement between the magnetic helicity computed by the twist method and the helicity contributed purely by the current-carrying magnetic field.
SubtypeArticle
KeywordSun: Activity Sun: Corona Sun: Magnetic Fields
WOS HeadingsScience & Technology ; Physical Sciences
Funding OrganizationISSI International Team on Magnetic Helicity estimations in models and observations of the solar magnetic field ; ISSI International Team on Magnetic Helicity estimations in models and observations of the solar magnetic field ; NSFC(11533005 ; NSFC(11533005 ; NKBRSF(2011CB811402 ; NKBRSF(2011CB811402 ; Belgian Federal Science Policy Office (BELSPO) ; Belgian Federal Science Policy Office (BELSPO) ; Poste Temporairement Vacant by the science council of the Observatoire de Paris ; Poste Temporairement Vacant by the science council of the Observatoire de Paris ; French Agence Nationale de la Recherche (ANR)(ANR-15-CE31-0001) ; French Agence Nationale de la Recherche (ANR)(ANR-15-CE31-0001) ; Leverhulme Trust(2014-051) ; Leverhulme Trust(2014-051) ; Russian Foundation of Basic Research(150201089a ; Russian Foundation of Basic Research(150201089a ; Federal Agency for Scientific Organizations(II.16.3.2) ; Federal Agency for Scientific Organizations(II.16.3.2) ; European Union ; European Union ; Greek national funds through the Operational Program Education and Lifelong Learning of the National Strategic Reference Framework (NSRF) Research Funding Program: "Thales. Investing in knowledge society through the European Social Fund ; Greek national funds through the Operational Program Education and Lifelong Learning of the National Strategic Reference Framework (NSRF) Research Funding Program: "Thales. Investing in knowledge society through the European Social Fund ; Austrian Science Fund (FWF)(P25383-N27) ; Austrian Science Fund (FWF)(P25383-N27) ; International Max-Planck Research School (IMPRS) for Solar System Science at the University of Gottingen ; International Max-Planck Research School (IMPRS) for Solar System Science at the University of Gottingen ; Chinese Academy of Sciences(KJCX2-EWT07 ; Chinese Academy of Sciences(KJCX2-EWT07 ; National Natural Science Foundation of China(11221063 ; National Natural Science Foundation of China(11221063 ; National Basic Research Program of China(2011CB811400) ; National Basic Research Program of China(2011CB811400) ; Collaborating Research Program of National Astronomical Observatories(KLSA2015) ; Collaborating Research Program of National Astronomical Observatories(KLSA2015) ; 11203014) ; 11203014) ; 2014CB744203) ; 2014CB744203) ; 150203835a ; 150203835a ; XDB09040200) ; XDB09040200) ; 11078012 ; 11078012 ; 16-32-00315-mol-a ; 16-32-00315-mol-a ; 11178016 ; 11178016 ; 153220504-mol-a-ved) ; 153220504-mol-a-ved) ; 11173033 ; 11173033 ; 11125314 ; 11125314 ; 10733020 ; 10733020 ; 10921303 ; 10921303 ; 11303053 ; 11303053 ; 11573037 ; 11573037 ; 10673016) ; 10673016) ; ISSI International Team on Magnetic Helicity estimations in models and observations of the solar magnetic field ; ISSI International Team on Magnetic Helicity estimations in models and observations of the solar magnetic field ; NSFC(11533005 ; NSFC(11533005 ; NKBRSF(2011CB811402 ; NKBRSF(2011CB811402 ; Belgian Federal Science Policy Office (BELSPO) ; Belgian Federal Science Policy Office (BELSPO) ; Poste Temporairement Vacant by the science council of the Observatoire de Paris ; Poste Temporairement Vacant by the science council of the Observatoire de Paris ; French Agence Nationale de la Recherche (ANR)(ANR-15-CE31-0001) ; French Agence Nationale de la Recherche (ANR)(ANR-15-CE31-0001) ; Leverhulme Trust(2014-051) ; Leverhulme Trust(2014-051) ; Russian Foundation of Basic Research(150201089a ; Russian Foundation of Basic Research(150201089a ; Federal Agency for Scientific Organizations(II.16.3.2) ; Federal Agency for Scientific Organizations(II.16.3.2) ; European Union ; European Union ; Greek national funds through the Operational Program Education and Lifelong Learning of the National Strategic Reference Framework (NSRF) Research Funding Program: "Thales. Investing in knowledge society through the European Social Fund ; Greek national funds through the Operational Program Education and Lifelong Learning of the National Strategic Reference Framework (NSRF) Research Funding Program: "Thales. Investing in knowledge society through the European Social Fund ; Austrian Science Fund (FWF)(P25383-N27) ; Austrian Science Fund (FWF)(P25383-N27) ; International Max-Planck Research School (IMPRS) for Solar System Science at the University of Gottingen ; International Max-Planck Research School (IMPRS) for Solar System Science at the University of Gottingen ; Chinese Academy of Sciences(KJCX2-EWT07 ; Chinese Academy of Sciences(KJCX2-EWT07 ; National Natural Science Foundation of China(11221063 ; National Natural Science Foundation of China(11221063 ; National Basic Research Program of China(2011CB811400) ; National Basic Research Program of China(2011CB811400) ; Collaborating Research Program of National Astronomical Observatories(KLSA2015) ; Collaborating Research Program of National Astronomical Observatories(KLSA2015) ; 11203014) ; 11203014) ; 2014CB744203) ; 2014CB744203) ; 150203835a ; 150203835a ; XDB09040200) ; XDB09040200) ; 11078012 ; 11078012 ; 16-32-00315-mol-a ; 16-32-00315-mol-a ; 11178016 ; 11178016 ; 153220504-mol-a-ved) ; 153220504-mol-a-ved) ; 11173033 ; 11173033 ; 11125314 ; 11125314 ; 10733020 ; 10733020 ; 10921303 ; 10921303 ; 11303053 ; 11303053 ; 11573037 ; 11573037 ; 10673016) ; 10673016)
DOI10.3847/1538-4357/aa6aa8
WOS KeywordQUASI-SEPARATRIX LAYERS ; CORONAL MASS EJECTIONS ; ACTIVE-REGION ; FLUX ROPES ; VECTOR MAGNETOGRAMS ; ERUPTION TOPOLOGIES ; EVOLUTION ; ENERGY ; FLARE ; CONFIGURATIONS
Indexed BySCI
Language英语
Funding OrganizationISSI International Team on Magnetic Helicity estimations in models and observations of the solar magnetic field ; ISSI International Team on Magnetic Helicity estimations in models and observations of the solar magnetic field ; NSFC(11533005 ; NSFC(11533005 ; NKBRSF(2011CB811402 ; NKBRSF(2011CB811402 ; Belgian Federal Science Policy Office (BELSPO) ; Belgian Federal Science Policy Office (BELSPO) ; Poste Temporairement Vacant by the science council of the Observatoire de Paris ; Poste Temporairement Vacant by the science council of the Observatoire de Paris ; French Agence Nationale de la Recherche (ANR)(ANR-15-CE31-0001) ; French Agence Nationale de la Recherche (ANR)(ANR-15-CE31-0001) ; Leverhulme Trust(2014-051) ; Leverhulme Trust(2014-051) ; Russian Foundation of Basic Research(150201089a ; Russian Foundation of Basic Research(150201089a ; Federal Agency for Scientific Organizations(II.16.3.2) ; Federal Agency for Scientific Organizations(II.16.3.2) ; European Union ; European Union ; Greek national funds through the Operational Program Education and Lifelong Learning of the National Strategic Reference Framework (NSRF) Research Funding Program: "Thales. Investing in knowledge society through the European Social Fund ; Greek national funds through the Operational Program Education and Lifelong Learning of the National Strategic Reference Framework (NSRF) Research Funding Program: "Thales. Investing in knowledge society through the European Social Fund ; Austrian Science Fund (FWF)(P25383-N27) ; Austrian Science Fund (FWF)(P25383-N27) ; International Max-Planck Research School (IMPRS) for Solar System Science at the University of Gottingen ; International Max-Planck Research School (IMPRS) for Solar System Science at the University of Gottingen ; Chinese Academy of Sciences(KJCX2-EWT07 ; Chinese Academy of Sciences(KJCX2-EWT07 ; National Natural Science Foundation of China(11221063 ; National Natural Science Foundation of China(11221063 ; National Basic Research Program of China(2011CB811400) ; National Basic Research Program of China(2011CB811400) ; Collaborating Research Program of National Astronomical Observatories(KLSA2015) ; Collaborating Research Program of National Astronomical Observatories(KLSA2015) ; 11203014) ; 11203014) ; 2014CB744203) ; 2014CB744203) ; 150203835a ; 150203835a ; XDB09040200) ; XDB09040200) ; 11078012 ; 11078012 ; 16-32-00315-mol-a ; 16-32-00315-mol-a ; 11178016 ; 11178016 ; 153220504-mol-a-ved) ; 153220504-mol-a-ved) ; 11173033 ; 11173033 ; 11125314 ; 11125314 ; 10733020 ; 10733020 ; 10921303 ; 10921303 ; 11303053 ; 11303053 ; 11573037 ; 11573037 ; 10673016) ; 10673016) ; ISSI International Team on Magnetic Helicity estimations in models and observations of the solar magnetic field ; ISSI International Team on Magnetic Helicity estimations in models and observations of the solar magnetic field ; NSFC(11533005 ; NSFC(11533005 ; NKBRSF(2011CB811402 ; NKBRSF(2011CB811402 ; Belgian Federal Science Policy Office (BELSPO) ; Belgian Federal Science Policy Office (BELSPO) ; Poste Temporairement Vacant by the science council of the Observatoire de Paris ; Poste Temporairement Vacant by the science council of the Observatoire de Paris ; French Agence Nationale de la Recherche (ANR)(ANR-15-CE31-0001) ; French Agence Nationale de la Recherche (ANR)(ANR-15-CE31-0001) ; Leverhulme Trust(2014-051) ; Leverhulme Trust(2014-051) ; Russian Foundation of Basic Research(150201089a ; Russian Foundation of Basic Research(150201089a ; Federal Agency for Scientific Organizations(II.16.3.2) ; Federal Agency for Scientific Organizations(II.16.3.2) ; European Union ; European Union ; Greek national funds through the Operational Program Education and Lifelong Learning of the National Strategic Reference Framework (NSRF) Research Funding Program: "Thales. Investing in knowledge society through the European Social Fund ; Greek national funds through the Operational Program Education and Lifelong Learning of the National Strategic Reference Framework (NSRF) Research Funding Program: "Thales. Investing in knowledge society through the European Social Fund ; Austrian Science Fund (FWF)(P25383-N27) ; Austrian Science Fund (FWF)(P25383-N27) ; International Max-Planck Research School (IMPRS) for Solar System Science at the University of Gottingen ; International Max-Planck Research School (IMPRS) for Solar System Science at the University of Gottingen ; Chinese Academy of Sciences(KJCX2-EWT07 ; Chinese Academy of Sciences(KJCX2-EWT07 ; National Natural Science Foundation of China(11221063 ; National Natural Science Foundation of China(11221063 ; National Basic Research Program of China(2011CB811400) ; National Basic Research Program of China(2011CB811400) ; Collaborating Research Program of National Astronomical Observatories(KLSA2015) ; Collaborating Research Program of National Astronomical Observatories(KLSA2015) ; 11203014) ; 11203014) ; 2014CB744203) ; 2014CB744203) ; 150203835a ; 150203835a ; XDB09040200) ; XDB09040200) ; 11078012 ; 11078012 ; 16-32-00315-mol-a ; 16-32-00315-mol-a ; 11178016 ; 11178016 ; 153220504-mol-a-ved) ; 153220504-mol-a-ved) ; 11173033 ; 11173033 ; 11125314 ; 11125314 ; 10733020 ; 10733020 ; 10921303 ; 10921303 ; 11303053 ; 11303053 ; 11573037 ; 11573037 ; 10673016) ; 10673016)
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000400915200004
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/8776
Collection太阳物理研究部
Affiliation1.Nanjing Univ, Minist Educ, Sch Astron & Space Sci, Nanjing 210023, Jiangsu, Peoples R China
2.Nanjing Univ, Minist Educ, Key Lab Modern Astron & Astrophys, Nanjing 210023, Jiangsu, Peoples R China
3.UPMC Univ Paris 06, Univ Paris Diderot, Sorbonne Univ, LESIA,Observ Paris,PSL Res Univ,CNRS,Sorbon Paris, F-92190 Meudon, France
4.Univ Coll London, Mullard Space Sci Lab, Holmbury St Mary, Dorking RH5 6NT, Surrey, England
5.Inst Solar Terr Phys SB RAS, POB 291,Lermontov St,126a, Irkutsk 664033, Russia
6.Max Planck Inst Sonnensyst Forsch, D-37077 Gottingen, Germany
7.Acad Athens, Res Ctr Astron & Appl Math, 4 Soranou Efesiou St, Athens 11527, Greece
8.Stanford Univ, WW Hansen Expt Phys Lab, Stanford, CA 94305 USA
9.Karl Franzens Univ Graz, Inst Phys, Univ Pl 5-2, A-8010 Graz, Austria
10.Chinese Acad Sci, Key Lab Solar Act, Natl Astron Observ, Beijing 100012, Peoples R China
Recommended Citation
GB/T 7714
Guo, Y.,Pariat, E.,Valori, G.,et al. Magnetic Helicity Estimations in Models and Observations of the Solar Magnetic Field. III. Twist Number Method[J]. ASTROPHYSICAL JOURNAL,2017,840(1).
APA Guo, Y..,Pariat, E..,Valori, G..,Anfinogentov, S..,Chen, F..,...&Yang, S..(2017).Magnetic Helicity Estimations in Models and Observations of the Solar Magnetic Field. III. Twist Number Method.ASTROPHYSICAL JOURNAL,840(1).
MLA Guo, Y.,et al."Magnetic Helicity Estimations in Models and Observations of the Solar Magnetic Field. III. Twist Number Method".ASTROPHYSICAL JOURNAL 840.1(2017).
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Guo, Y.]'s Articles
[Pariat, E.]'s Articles
[Valori, G.]'s Articles
Baidu academic
Similar articles in Baidu academic
[Guo, Y.]'s Articles
[Pariat, E.]'s Articles
[Valori, G.]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Guo, Y.]'s Articles
[Pariat, E.]'s Articles
[Valori, G.]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.