High-resolution observations of a light bridge in a decaying sunspot
2014 (English)In: SEVENTH EUROPEAN SUMMER SCHOOL ON EXPERIMENTAL NUCLEAR ASTROPHYSICS, 2014, Vol. 1595, 221-223 p.Conference paper (Refereed)
Light brigde are small-scale structures observed in the solar photosphere which separate the umbra of a sunspot in two or more parts. On 6 August 2011, we observed at the Swedish 1-m Solar Telescope a large sunspot of the Active Region NOAA 11263 with a light bridge. We acquired full Stokes profiles over the Fe I line at 630.25 nm and spectroscopic data along the Fe I line profile at 557.6 nm for about an hour, from 09: 53: 32 UT to 10: 48: 43 UT. Data in the core of the Ca II H line at 396.8 nm were simultaneously acquired. The Active Region was also observed by SDO and SOT/HINODE to study the dynamics and the magnetic evolution of the light bridge. Thanks to these high-resolution observations the fine structure of this element and its properties are better studied to determine the physical processes behind its formation.
Place, publisher, year, edition, pages
2014. Vol. 1595, 221-223 p.
, AIP Conference Proceedings, ISSN 0094-243X
Sunspots, Sun: magnetic field, Sun: photosphere, Astrophysical plasmas
Astronomy, Astrophysics and Cosmology
IdentifiersURN: urn:nbn:se:uu:diva-257494DOI: 10.1063/1.4875316ISI: 000354945900032ISBN: 978-0-7354-1229-3OAI: oai:DiVA.org:uu-257494DiVA: diva2:839468
7th European Summer School on Experimental Nuclear Astrophysics, SEP 15-27, 2013, ITALY