| Issue |
A&A
Volume 665, September 2022
|
|
|---|---|---|
| Article Number | A98 | |
| Number of page(s) | 7 | |
| Section | The Sun and the Heliosphere | |
| DOI | https://doi.org/10.1051/0004-6361/202243175 | |
| Published online | 15 September 2022 | |
Diagnostics of the dynamics of the Langmuir spectrum based on radio emission during the 12 March 2015 solar radio burst
1
Ioffe Institute, 26 Politekhnicheskaya, 194021 St. Petersburg, Russia
e-mail: igor.koudriavtsev@mail.ioffe.ru
2
Central Astronomical Observatory of RAS, St. Petersburg, Pulkovskoe shosse 65/1 196140, Russia
3
Special Astrophysical Observatory of RAS, Pulkovskoe shosse 65/2, 196140 St. Petersburg, Russia
e-mail: arles@mail.ru
4
Astronomical Institute ASCR, Fričova 298, 251 65 Ondřejov, Czech Republic
e-mail: marian.karlicky@asu.cas.cz
Received:
22
January
2022
Accepted:
21
June
2022
Aims. We investigate the dynamics of spectra of Langmuir waves in the plasma radiation of solar radio bursts.
Methods. We simulated the radio emission that is formed during the merging of Langmuir waves. The observed frequency spectra of radio bursts were fitted by the model spectrum of Langmuir waves.
Results. We determined shapes of the Langmuir wave spectra, consistent with the solar burst observed in the 0.8–2.0 GHz range on 12 March 2015 by the Ondřejov radiospectrograph. We estimated the sizes of the corresponding radio source for different values of the energy density of Langmuir waves. We present the time evolution of the model Langmuir wave spectra at four instants. Finally, we explain a role of the induced scattering of Langmuir waves in the formation of their spectra.
Key words: Sun: flares / Sun: radio radiation / Sun: oscillations
© I. V. Kudryavtsev et al. 2022
Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
This article is published in open access under the Subscribe-to-Open model. Subscribe to A&A to support open access publication.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.