Flare line impact polarization Na D2 589 nm line polarization in the 2001 June 15 flare
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F13%3A00399161" target="_blank" >RIV/67985815:_____/13:00399161 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1051/0004-6361/201219478" target="_blank" >http://dx.doi.org/10.1051/0004-6361/201219478</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1051/0004-6361/201219478" target="_blank" >10.1051/0004-6361/201219478</a>
Alternative languages
Result language
angličtina
Original language name
Flare line impact polarization Na D2 589 nm line polarization in the 2001 June 15 flare
Original language description
The impact polarization of optical chromospheric lines in solar flares is still being debated. For this reason, additional observations and improved flare atmosphere models are needed still. The polarization-free telescope THEMIS used in multiline 2 MulTiRaies (MTR) mode allows accurate simultaneous linear polarization measurements in various spectral lines. The Na D2 line is linearly polarized with a polarization degree exceeding 5% at some locations. The polarization was found to be radial at outer ribbons edges, and tangential at their inner edges. This orientation change may be due to differences in electron distribution functions on the opposite borders of flare chromospheric ribbons. Electron beams propagating along magnetic field lines, togetherwith return currents, could explain both radial and tangential polarization. At the inner ribbon edges, intensity profile-width enlargements and blueshifts in polarization profiles are observed. This suggests chromospheric evaporation.
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BN - Astronomy and celestial mechanics, astrophysics
OECD FORD branch
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Result continuities
Project
<a href="/en/project/GAP209%2F12%2F0103" target="_blank" >GAP209/12/0103: Radio and X-ray diagnostics of primary-energy-release processes in solar flares and their numerical simulations</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2013
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Astronomy & Astrophysics
ISSN
0004-6361
e-ISSN
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Volume of the periodical
556
Issue of the periodical within the volume
August
Country of publishing house
FR - FRANCE
Number of pages
8
Pages from-to
"A95/1"-"A95/8"
UT code for WoS article
000323893500095
EID of the result in the Scopus database
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