Observational cross helicity on the solar surface

被引：0
作者：
MingYu Zhao
XiaoFan Wang
HongQi Zhang
机构：
[1] Chinese Academy of Sciences,Key Laboratory of Solar Activity, National Astronomical Observatory
来源：
Science China Physics, Mechanics and Astronomy | 2014年 / 57卷
关键词：
cross helicity; photosphere; magnetic fields; solar activity;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
We analyzed the correlation of the solar magnetograms and Dopplergrams from SOHO/MDI and SDO/HMI respectively. It is found that the full disk correlation coefficient of Dopplergrams is more than 0.80 between SOHO/MDI and SDO/HMI. The full disk correlation coefficient of magnetograms is about 0.73 and is more than 0.95 for active regions only. We also analyzed the distribution of the cross helicity (velocity-magnetic-field correlation) on the solar surface. It is found that the latitude distributions of the cross helicity based on SOHO/MDI data and SDO/HMI data have similar tendencies, and in the analysis of solar active regions the amplitude of the horizontal component of the mean cross helicity is about two times the line-of-sight one.
引用
收藏
页码：589 / 596
页数：7
相关论文
共 50 条
  • [31] Synchronized Helicity Oscillations: A Link Between Planetary Tides and the Solar Cycle?
    Stefani, F.
    Giesecke, A.
    Weber, N.
    Weier, T.
    [J]. SOLAR PHYSICS, 2016, 291 (08) : 2197 - 2212
  • [32] What helicity can tell us about solar magnetic fields
    Pevtsov, Alexei A.
    [J]. JOURNAL OF ASTROPHYSICS AND ASTRONOMY, 2008, 29 (1-2) : 49 - 56
  • [33] Testing magnetic helicity conservation in a solar-like active event
    Pariat, E.
    Valori, G.
    Demoulin, P.
    Dalmasse, K.
    [J]. ASTRONOMY & ASTROPHYSICS, 2015, 580
  • [34] What helicity can tell us about solar magnetic fields
    Alexei A. Pevtsov
    [J]. Journal of Astrophysics and Astronomy, 2008, 29 : 49 - 56
  • [35] THE TURBULENT HEATING RATE IN STRONG MAGNETOHYDRODYNAMIC TURBULENCE WITH NONZERO CROSS HELICITY
    Chandran, Benjamin D. G.
    Quataert, Eliot
    Howes, Gregory G.
    Hollweg, Joseph V.
    Dorland, William
    [J]. ASTROPHYSICAL JOURNAL, 2009, 701 (01) : 652 - 657
  • [36] Cross and magnetic helicity in the outer heliosphere from Voyager 2 observations
    Iovieno, M.
    Gallana, L.
    Fraternale, F.
    Richardson, J. D.
    Opher, M.
    Tordella, D.
    [J]. EUROPEAN JOURNAL OF MECHANICS B-FLUIDS, 2016, 55 : 394 - 401
  • [37] On the weak solutions for the MHD systems with controllable total energy and cross helicity
    Miao, Changxing
    Ye, Weikui
    [J]. JOURNAL DE MATHEMATIQUES PURES ET APPLIQUEES, 2024, 181 : 190 - 227
  • [38] On the Origin of Differences in Helicity Parameters Derived from Data of Two Solar Magnetographs
    Haiqing Xu
    Hongqi Zhang
    K. Kuzanyan
    T. Sakurai
    [J]. Solar Physics, 2016, 291 : 2253 - 2267
  • [39] Current helicity and twist as two indicators of the mirror asymmetry of solar magnetic fields
    Sokoloff, D.
    Zhang, H.
    Kuzanyan, K. M.
    Obridko, V. N.
    Tomin, D. N.
    Tutubalin, V. N.
    [J]. SOLAR PHYSICS, 2008, 248 (01) : 17 - 28
  • [40] Comparison analysis of current helicity inferred from several solar vector magnetographs
    Xu HaiQing
    [J]. SCIENTIA SINICA-PHYSICA MECHANICA & ASTRONOMICA, 2020, 50 (04)
12345