Hostname: page-component-848d4c4894-cjp7w Total loading time: 0 Render date: 2024-06-25T11:48:45.241Z Has data issue: false hasContentIssue false
  • English
  • Français

Flare Occurrence in the Solar Active Regions with Reversed Helicity Sign

Published online by Cambridge University Press:  13 May 2016

S. D. Bao ,
G. X. Ai  and
H. Q. Zhang
S. D. Bao
Affiliation:
Beijing Astronomical Observatory/National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
G. X. Ai
Affiliation:
Beijing Astronomical Observatory/National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
H. Q. Zhang
Affiliation:
Beijing Astronomical Observatory/National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Based on the Huairou Solar Observing Station dataset, we computed the current helicity for several hundreds of active regions and found that: (1) Active regions that do not follow the hemispheric helicity sign rule show more flare activity than normal active regions. (2) The relative number of active regions with reversed helicity sign is higher near sunspot maximum. (3) It appears that during solar cycle 22 the southern hemisphere has more the reversed-sign active regions and stronger flare activity than the northern hemisphere.

Type
Session III: Active Region Structure and Dynamics
Information
Symposium - International Astronomical Union , Volume 203: Recent Insights into the Physics of the Sun and Heliosphere: Highlights from Soho and Other Space Missions , 2001 , pp. 247 - 250
Copyright
Copyright © Astronomical Society of the Pacific 2001 

References

Bao, S. D., Ai, G. X., & Zhang, H. Q. 2000, J. Astrophys. Astr., in press.Google Scholar
Bao, S. D., Pevtsov, A. A., Wang, T. J., & Zhang, H. Q. 2000, Solar Phys., 195, 75.Google Scholar
Bao, S. D. & Zhang, H. Q. 1998, ApJ, 496, L43.CrossRefGoogle Scholar
Bao, S. D., Zhang, H. Q., Ai, G. X., & Zhang, M. 1999, A&AS, 139, 311.Google Scholar
Canfield, R. C., Hudson, H. S., & McKenzie, D. E. 1999, Geophysical Research Letters, 26, 627.Google Scholar
Pevtsov, A. A., Canfield, R. C., & Metcalf, T. R. 1995, ApJ, 440, L109.CrossRefGoogle Scholar
Pevtsov, A. A., Canfield, R. C., & Zirin, H. 1996, ApJ, 473, 533.Google Scholar
Zhang, H. Q. & Bao, S. D. 1999, ApJ, 519, 876.Google Scholar
Wang, J. X., Shi, Z. X., Wang, H. N., & Lü, Y. P. 1996, ApJ, 456, 861.Google Scholar