High-frequency reverse drift bursts in 2012-2014 solar flares

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F15%3A00452726" target="_blank" >RIV/67985815:_____/15:00452726 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
High-frequency reverse drift bursts in 2012-2014 solar flares
Original language description
During observations by the Ondřejov high-time resolution 0.8-2.0 GHz radio spectrograph in years 2012-2014, 33 high-frequency reverse drift bursts with frequency drift less than 500 MHz s-1 were found. In 23 cases these bursts were observed before the GOES flare maximum, while the remaining 10 after this GOES maximum. Using the Aschwanden's density model of the solar atmosphere and assuming the radio emission on the harmonic plasma frequency, the corresponding velocities of the agents generating these bursts are less than 7000 km s-1. These velocities are too slow for electron beams, therefore we propose that these bursts are generated by thermal conduction fronts or by magnetohydrodynamic shocks.
Czech name
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Czech description
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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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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

Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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