Direct evidence that twisted flux tube emergence creates solar active regions.

ABSTRACT: The magnetic nature of the formation of solar active regions lies at the heart of understanding solar activity and, in particular, solar eruptions. A widespread model, used in many theoretical studies, simulations and the interpretation of observations, is that the basic structure of an active region is created by the emergence of a large tube of pre-twisted magnetic field. Despite plausible reasons and the availability of various proxies suggesting the accuracy of this model, there has not yet been a methodology that can clearly and directly identify the emergence of large pre-twisted magnetic flux tubes. Here, we present a clear signature of the emergence of pre-twisted magnetic flux tubes by investigating a robust topological quantity, called magnetic winding, in solar observations. Thi

SUBMITTER: MacTaggart D 

PROVIDER: S-EPMC8595608 | biostudies-literature | 2021 Nov

REPOSITORIES: biostudies-literature