Astronomy and Astrophysics – Astronomy
Scientific paper
May 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009spd....40.0911z&link_type=abstract
American Astronomical Society, SPD meeting #40, #9.11; Bulletin of the American Astronomical Society, Vol. 41, p.819
Astronomy and Astrophysics
Astronomy
Scientific paper
Tian & Alexander (2009) studied 15 emerging active regions and found that magnetic helicity flux injected into the corona by the leading polarity is generally several times larger than that injected by the following polarity. They thought that the asymmetry of the magnetic helicity should be responsible for the asymmetry of the magnetic morphology, i.e, the leading magnetic field of bipolar active regions is often spatially more compact, while more dispersed and fragmented in following polarity. Though they take into account and "remove" possible effect from magnetic flux imbalance, however, we still don't know how much it affects. In this paper, we will calculate the magnetic flux and helicity flux of two emerging active regions observed by SOHO/MDI and Hinode, find their difference, and study possible origins resulting in the helicity flux imbalance.
Alexander Dave
Tian LanLan
Zhu Chunming
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