کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1768145 | 1020216 | 2007 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Magnetic and current helicities in solar dynamos
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موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علوم فضا و نجوم
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چکیده انگلیسی
Current helicity data for solar active region provide the unique observational information for so-called α-effect which plays a key role in astrophysical dynamos producing large-scale magnetic fields of celestial bodies. We discuss problems arising in comparison between helicity data and predictions of solar dynamo theory. In particular, a significant excess of active regions with the “wrong” sign of helicity is seen to occur just at the beginning of the 11-year solar cycle. We attribute the excess partially to additional current helicity production from the twisting of rising magnetic flux tubes. We demonstrate that the excess is much less pronounced in the twist data. Future perspectives of helicity observations are discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Advances in Space Research - Volume 39, Issue 11, 2007, Pages 1670-1673
Journal: Advances in Space Research - Volume 39, Issue 11, 2007, Pages 1670-1673
نویسندگان
Dmitry Sokoloff, Hongqi Zhang, Kirill M. Kuzanyan, Dmitry Tomin,