Evidence Of An Association Between The Presence Of Penumbrae And Strong Radial Outflows In Sunspots

Bibcode
2006ESASP.641E..87S
Santiago Vargas, D.; Bonet, J. A.; Martinez Pillet, V.; Katsukawa, Y. %P87
Bibliographical reference

Proceedings of The Second Solar Orbiter Workshop, by Marsch, E.; Tsinganos, K.; Marsden, R.; Conroy, L. ESA-SP 641. ISBN: 92-9291-205-2. Noordwijk, Netherlands: European Space Agency, 2006, id. 87.

Advertised on:
10
2006
Number of authors
4
IAC number of authors
0
Citations
0
Refereed citations
0
Description
Time series of high-resolution images of the complex ac-tive region NOAA 10786 are studied. The observations were performed in G-band (430.5 nm) and in the nearby continuum (463.3 nm), on July 9, 2005 at the Swedish 1-meter Solar Telecope (SST) in La Palma. Granular proper motions in the surroundings of the sunspots have been quantified. A large-scale radial outflow in the velocity range 0.3 - 1 km s-1 has been measured around the sunspots by using local correlation tracking techniques. However, this outflow is not found in those regions around the sunspots with no penumbral structure. This result evidences an association between penumbrae and the existence of strong horizontal outflows (the moat) in sunspots.
Type
Non-refereed

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