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Simulation of Microwave Emission from the Magnetic Arch with Growing Millimeter Spectrum
Tekijät: Morgachev AS, Tsap YT, Smirnova VV, Motorina GG, Kuznetsov SA
Kustantaja: MAIK NAUKA/INTERPERIODICA/SPRINGER
Julkaisuvuosi: 2017
Journal: Geomagnetism and Aeronomy
Tietokannassa oleva lehden nimi: GEOMAGNETISM AND AERONOMY
Lehden akronyymi: GEOMAGN AERONOMY+
Vuosikerta: 57
Numero: 8
Aloitussivu: 1028
Lopetussivu: 1037
Sivujen määrä: 10
ISSN: 0016-7932
eISSN: 1555-645X
DOI: https://doi.org/10.1134/S0016793217080175
Tiivistelmä
A three-dimensional simulation of the microwave emission of nonthermal electrons within a flare magnetic loop that takes into account the influence of the chromosphere has been carried out. The paper investigates the possibility of the generation of a microwave spectrum (observed for some solar flares) with a maximum in the centimeter wavelength range and a positive slope in the millimeter one under the some distribution of the magnetic field strength and the parameters of the anisotropic nonthermal electrons along the loop. By the example of the event on July 5, 2012, it is shown that nonthermal electrons can be responsible not only for the centimeter bell-shaped emission spectrum generated in the coronal part of the loop but also for the increasing millimeter spectrum generated in the chromosphere.
A three-dimensional simulation of the microwave emission of nonthermal electrons within a flare magnetic loop that takes into account the influence of the chromosphere has been carried out. The paper investigates the possibility of the generation of a microwave spectrum (observed for some solar flares) with a maximum in the centimeter wavelength range and a positive slope in the millimeter one under the some distribution of the magnetic field strength and the parameters of the anisotropic nonthermal electrons along the loop. By the example of the event on July 5, 2012, it is shown that nonthermal electrons can be responsible not only for the centimeter bell-shaped emission spectrum generated in the coronal part of the loop but also for the increasing millimeter spectrum generated in the chromosphere.
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