Rapid Temporal Variability of Faculae: High-Resolution Observations and Modeling
2006 (English)In: The Astrophysical Journal, ISSN 0004-637X, Vol. 646, no 2, 1405-1420 p.Article in journal (Refereed) Published
We present high-resolution G-band observations (obtained with the Swedish 1 m Solar Telescope) of the rapid temporal variability of faculae, which occurs on granular timescales. By combining these observations with magnetoconvection simulations of a plage region, we show that much of this variability is not intrinsic to the magnetic field concentrations that are associated with faculae, but rather a phenomenon associated with the normal evolution and splitting of granules. We also show examples of facular variability caused by changes in the magnetic field, with movies of dynamic behavior of the striations that dominate much of the facular appearance at 0.1" resolution. Examples of these dynamics include merging, splitting, rapid motion, apparent fluting, and possibly swaying.
Place, publisher, year, edition, pages
2006. Vol. 646, no 2, 1405-1420 p.
Sun: Chromosphere, Sun: Magnetic Fields, Sun: Photosphere
Astronomy, Astrophysics and Cosmology
IdentifiersURN: urn:nbn:se:su:diva-20172DOI: doi:10.1086/505074OAI: oai:DiVA.org:su-20172DiVA: diva2:186697