The Properties of the Tilts of Bipolar Solar Regionsстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 20 сентября 2015 г.
Аннотация:We investigate various properties associated with the tilt of isolated magnetic
bipoles in magnetograms taken at the solar surface. We show that bipoles can be divided
into two groups that have tilts of opposite signs, and reveal similar properties with respect
to bipole area, flux, and bipolar moment. Detailed comparison of these physical quantities
shows that the dividing point between the two types of bipoles corresponds to a bipole
area of about 300 millionths of the solar hemisphere. The time–latitude distribution of small
bipoles differs substantially from that for large bipoles. Such a behaviour in terms of dynamo
theory may indicate that small and large bipoles trace different components of the solar
magnetic field. The other possible explanation is that the difference in tilt data for small and
large bipoles is connected with spectral helicity separation, which results in opposite tilts for
small and large bipoles. We note that the data available do not provide convincing reasons
to prefer either interpretation.