34th Solar Physics Division Meeting, June 2003
Session 11 Photosphere and Chormosphere II
Oral, Tuesday, June 17, 2003, 1:30-3:30pm, Auditorium

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[11.08] Observations of magnetoconvection in Sunspots with 100 km resolution

T. E Berger (Lockheed Martin Solar and Astrophysics Lab), M. G. Löfdahl, G. Scharmer (Institute for Solar Physics, Stockholm), A. M. Title (Lockheed Martin Solar and Astrophysics Lab)

We present new observations from the Swedish 1-meter Solar Telescope (SST) on La Palma with ~!0.1~arcsecond (~!100~km) resolution: the highest resolution yet achieved in solar observations. We focus on sunspot and active region magnetoconvective phenomena using G-band 4305~Å, 4877~Å\ continuum, 7507~Å\ TiO bandhead, and Ca~II 3968~Å\ H-line filtergram movies. The G-band data are post-processed using Joint Phase Diverse Speckle wavefront restoration to create a full diffraction limited time series. Sunspot light-bridges are shown to have dark lanes less than 300~km in width that are coherent along the entire length of the bridge. Similarly, we find elongated dark ``canals'' in plage regions, particularly near pores, that appear to be highly modified intergranular downflow lanes. The canals are less than 200~km in width and are much more coherent than intergranular lanes in non-magnetic regions, often retaining their basic structure for more than one granular turn-over time. Both the light-bridge central lane and the canals appear to be the result of highly constrained flow structure in strong magnetic field regions -- an aspect of solar magnetoconvection that has not previously been observed. This reseach was supported by funding from the Royal Swedish Academy of Sciences, a SOHO Guest Investigator subcontract to California State University Northridge, and the NASA TRACE contract NAS5-38099 at Lockheed Martin.


The author(s) of this abstract have provided an email address for comments about the abstract: berger@lmsal.com

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