Temporal variations in fibril orientation

J. Koza, P. Sütterlin, A. Kucera, J. Rybák

Research output: Chapter in Book/Report/Conference proceedingChapterAcademicpeer-review


We measure variations in orientation of fourteen dynamic fibrils as a function of time in a small isolated plage and nearby network using a 10- min time sequence of Hα filtergrams obtained by the Dutch Open Telescope. We found motions with average angular velocities of the order of 1 deg min−1 suggesting systematic turning from one limit position to another, particularly apparent in the case of fibrils with lifetimes of a few minutes. Shorter fibrils tend to turn faster than longer ones, which we interpret as due to vortex flows in the underlying granulation that twist magnetic fields.
Original languageUndefined/Unknown
Title of host publicationThe physics of chromospheric plasmas : proceedings of the Coimbra Solar Physics Meeting held at the University of Coimbra, Coimbra, Portugal, October 9 - October 13, 2006
EditorsPetr Heinzel, Ivan Dorotovic, Robert J. Rutten
Place of PublicationSan Francisco
PublisherAstronomical Society of the Pacific
Number of pages653
ISBN (Print)9781583812365
Publication statusPublished - 2007

Publication series

NameAstronomical Society of the Pacific conference series

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