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STUDY OF THE POYNTING FLUX IN ACTIVE REGION 10930 USING DATA-DRIVEN MAGNETOHYDRODYNAMIC SIMULATION
Fan, Y. L.1,2; Wang, H. N.1; He, H.1; Zhu, X. S.1,2
2011-08-10
Source PublicationASTROPHYSICAL JOURNAL
Volume737Issue:1
AbstractPowerful solar flares are closely related to the evolution of magnetic field configuration on the photosphere. We choose the Poynting flux as a parameter in the study of magnetic field changes. We use time-dependent multidimensional MHD simulations around a flare occurrence to generate the results, with the temporal variation of the bottom boundary conditions being deduced from the projected normal characteristic method. By this method, the photospheric magnetogram could be incorporated self-consistently as the bottom condition of data-driven simulations. The model is first applied to a simulation datum produced by an emerging magnetic flux rope as a test case. Then, the model is used to study NOAA AR 10930, which has an X3.4 flare, the data of which has been obtained by the Hinode/Solar Optical Telescope on 2006 December 13. We compute the magnitude of Poynting flux (S-total), radial Poynting flux (S-z), a proxy for ideal radial Poynting flux (S-proxy), Poynting flux due to plasma surface motion (S-sur), and Poynting flux due to plasma emergence (S-emg) and analyze their extensive properties in four selected areas: the whole sunspot, the positive sunspot, the negative sunspot, and the strong-field polarity inversion line (SPIL) area. It is found that (1) the S-total, S-z, and S-proxy parameters show similar behaviors in the whole sunspot area and in the negative sunspot area. The evolutions of these three parameters in the positive area and the SPIL area are more volatile because of the effect of sunspot rotation and flux emergence. (2) The evolution of S-sur is largely influenced by the process of sunspot rotation, especially in the positive sunspot. The evolution of S-emg is greatly affected by flux emergence, especially in the SPIL area.
KeywordSun: Activity Sun: Evolution Sun: Flares Sun: Photosphere
DOI10.1088/0004-637X/737/1/39
Indexed BySCI
Language英语
WOS IDWOS:000293332200039
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/7917
Collection太阳物理研究部
Affiliation1.Chinese Acad Sci, Key Lab Solar Act, Natl Astron Observ, Beijing 100012, Peoples R China
2.Chinese Acad Sci, Coll Phys, Grad Univ, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Fan, Y. L.,Wang, H. N.,He, H.,et al. STUDY OF THE POYNTING FLUX IN ACTIVE REGION 10930 USING DATA-DRIVEN MAGNETOHYDRODYNAMIC SIMULATION[J]. ASTROPHYSICAL JOURNAL,2011,737(1).
APA Fan, Y. L.,Wang, H. N.,He, H.,&Zhu, X. S..(2011).STUDY OF THE POYNTING FLUX IN ACTIVE REGION 10930 USING DATA-DRIVEN MAGNETOHYDRODYNAMIC SIMULATION.ASTROPHYSICAL JOURNAL,737(1).
MLA Fan, Y. L.,et al."STUDY OF THE POYNTING FLUX IN ACTIVE REGION 10930 USING DATA-DRIVEN MAGNETOHYDRODYNAMIC SIMULATION".ASTROPHYSICAL JOURNAL 737.1(2011).
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