Observational cross helicity on the solar surface

被引：1
|
作者：
Zhao MingYu [1 ]
Wang XiaoFan [1 ]
Zhang HongQi [1 ]
机构：
[1] Chinese Acad Sci, Natl Astron Observ, Key Lab Solar Act, Beijing 100012, Peoples R China
来源：
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY | 2014年 / 57卷 / 03期
基金：
中国国家自然科学基金;
关键词：
cross helicity; photosphere; magnetic fields; solar activity; TIME;
D O I：
10.1007/s11433-013-5174-6
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
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：8
相关论文
共 50 条
  • [21] HELICITY CONDENSATION AS THE ORIGIN OF CORONAL AND SOLAR WIND STRUCTURE
    Antiochos, S. K.
    ASTROPHYSICAL JOURNAL, 2013, 772 (01)
  • [22] First observational application of a connectivity-based helicity flux density
    Dalmasse, K.
    Pariat, E.
    Valori, G.
    Demoulin, P.
    Green, L. M.
    ASTRONOMY & ASTROPHYSICS, 2013, 555
  • [23] Studying the Transfer of Magnetic Helicity in Solar Active Regions with the Connectivity-based Helicity Flux Density Method
    Dalmasse, K.
    Pariat, E.
    Valori, G.
    Jing, J.
    Demoulin, P.
    ASTROPHYSICAL JOURNAL, 2018, 852 (02)
  • [24] Tracing magnetic helicity from the solar corona to the interplanetary space
    Luoni, ML
    Mandrini, CH
    Dasso, S
    van Driel-Gesztelyi, L
    Démoulin, P
    JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS, 2005, 67 (17-18) : 1734 - 1743
  • [25] Helicity proxies from linear polarisation of solar active regions
    Prabhu, A.
    Brandenburg, A.
    Kaepylae, M. J.
    Lagg, A.
    ASTRONOMY & ASTROPHYSICS, 2020, 641
  • [26] Magnetic clouds along the solar cycle: expansion and magnetic helicity
    Dasso, Sergio
    Demoulin, Pascal
    Gulisano, Adriana M.
    COMPARATIVE MAGNETIC MINIMA: CHARACTERIZING QUIET TIMES IN THE SUN AND STARS, 2012, (286): : 139 - 148
  • [27] Yoshizawa's cross-helicity effect and its quenching
    Brandenburg, A.
    Raedler, K-H.
    GEOPHYSICAL AND ASTROPHYSICAL FLUID DYNAMICS, 2013, 107 (1-2) : 207 - 217
  • [28] Cross-helicity effects and turbulent transport in magnetohydrodynamic flow
    Yokoi, Nobumitsu
    Balarac, Guillaume
    13TH EUROPEAN TURBULENCE CONFERENCE (ETC13): GEOPHYSICAL AND MAGNETOHYDRODYNAMIC TURBULENCE, 2011, 318
  • [29] Toroidal Flux Ropes with Elliptical Cross Sections and Their Magnetic Helicity
    Vandas, M.
    Romashets, E.
    SOLAR PHYSICS, 2017, 292 (09)
  • [30] Toroidal Flux Ropes with Elliptical Cross Sections and Their Magnetic Helicity
    M. Vandas
    E. Romashets
    Solar Physics, 2017, 292
12345