Plasma Flows in Emerging Sunspots in Pictures

Details Plasma Flows in Emerging Sunspots in Pictures Plasma Flows in Emerging Sunspots in Pictures

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aspc..354..249p&link_type=abstract

Solar MHD Theory and Observations: A High Spatial Resolution Perspective ASP Conference Series, Vol. 354, Proceedings of the Con

Astronomy and Astrophysics

Astronomy

2

Scientific paper

We present pictorial results of our study of plasma flows in fifteen emerging active regions using Dopplergrams, magnetograms, and white light observations from SOHO-MDI. The study focuses on: (1) asymmetric flows between two opposite polarities of the same active region, (2) search for systematic flows in area of active region development prior to flux emergence, and (3) timing between development of the Evershed flow and sunspot penumbra. Asymmetric flows are found in three active regions. In two regions, flows are directed from following to preceding polarity, and in one region material flows from the preceding to the following polarity. We observed no consistent plasma flows at the future location of an active region before its emergence. We describe one case when sunspot penumbra developed before establishing the Evershed flow.

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