Liu Yu
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Supervisor of Doctorate Candidates
Supervisor of Master's Candidates
- Doctoral Supervisor
- Master Tutor
- Business Address:x30353
- Academic Titles:Director of the Center for Astrophysics, SWJTU
- Other Post:实测天体物理团队负责人
- Alma Mater:中国科学院研究生院（现国科大）
- Supervisor of Doctorate Candidates
- Supervisor of Master's Candidates
- School/Department:School of Physical Science and Technology
- Discipline:Astrophysics.
Space Physics
Plasmphysics
Contact Information
- Email：
- Paper Publications
[Title] Helicity observations of active regions during the exchange period of Solar Cycle 24 and 25
- Impact Factor:4.8
- DOI number:10.1093/mnras/stab3182
- Teaching and Research Group:天体物理
- Journal:Monthly Notices of the Royal Astronomical Society
- Key Words:Sun: photosphere;sunspots;Sun: magnetic fields
- Abstract:Using vector magnetic field data from the Helioseismic and Magnetic Imager instrument onboard the Solar Dynamics Observatory,this study investigates the signs of helicity (magnetic twist and current helicity) and tilt angles of 85 active regions observed during the exchange period between Solar Cycle 24 and 25. The statistical properties of hemispherical helicity rules and their relationship with tilt angles are examined. The results show that most active regions follow the hemispherical helicity rule,without evidence of sign reversal during the cycle transition,and that no significant correlation is found between helicity and tilt angle.
- Co-author:Liu Y,Zhang Y,Huang J,Zhang HQ
- First Author:Liu JH
- Document Code:039
- Discipline:Science
- First-Level Discipline:Astronomy
- Volume:509
- Issue:4
- Page Number:pp.5298-5304
- ISSN No.:0035-8711
- Translation or Not:no
- Date of Publication:2022-02-01