Fine structures of a solar type III radio bursts observed with LOFAR

Bartosz Dabrowski; Aleksandra Wolowska; Christian Vocks; Jasmina Magdalenić; Peijin Zhang; Pawel Flisek; Malte Bröse; Diana E. Morosan; Andrzej Krankowski; Adam Fron; Gottfried Mann; Pietro Zucca; Mario Bisi; Richard Fallows; Peter Gallagher; Christophe Marqué; Barbara Matyjasiak; Hanna Rothkaehl

doi:10.1007/s11600-024-01421-4

Fine structures of a solar type III radio bursts observed with LOFAR

Bartosz Dabrowski, Aleksandra Wolowska, Christian Vocks, Jasmina Magdalenić, Peijin Zhang, Pawel Flisek, Malte Bröse, Diana E. Morosan, Andrzej Krankowski, Adam Fron, Gottfried Mann, Pietro Zucca, Mario Bisi, Richard Fallows, Peter Gallagher, Christophe Marqué, Barbara Matyjasiak, Hanna Rothkaehl

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

We present spectral and imaging LOFAR (LOw-Frequency ARray) observations in the 20 – 40 MHz range of solar radio bursts fine structures, such as flag-like, sail-like, and dot-like that appeared on 8 April 2019. These structures were associated with type III solar radio bursts that occurred in the 40 – 80 MHz band. The mean duration and spectral widths of the fine structures range from 1.0 to 3.4 s and from 0.3 to 0.9 MHz, respectively. Additionally, we investigated the radio images of eight fine structures – two flags, two sails and four dots. This allowed us to determine their emission source sizes, which ranged from 240 to 392 arcmin2, and their frequencies from 25.58 to 39.25 MHz as well as their location. They occurred on the east side of the Sun and were most likely associated with an emerging active region NOAA AR 12738, where a weak B1.7 flare was observed.

Original language	English
Pages (from-to)	987-993
Number of pages	7
Journal	Acta Geophysica
Volume	73
Issue number	1
DOIs	https://doi.org/10.1007/s11600-024-01421-4
State	Published - Feb 2025
Externally published	Yes

Keywords

Bursts
Corona
Fine structures
LOFAR
Radio
Sun

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10.1007/s11600-024-01421-4

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Dabrowski, B., Wolowska, A., Vocks, C., Magdalenić, J., Zhang, P., Flisek, P., Bröse, M., Morosan, D. E., Krankowski, A., Fron, A., Mann, G., Zucca, P., Bisi, M., Fallows, R., Gallagher, P., Marqué, C., Matyjasiak, B., & Rothkaehl, H. (2025). Fine structures of a solar type III radio bursts observed with LOFAR. Acta Geophysica, 73(1), 987-993. https://doi.org/10.1007/s11600-024-01421-4

@article{727f8961ae36443c8ebb51dd86abf279,

title = "Fine structures of a solar type III radio bursts observed with LOFAR",

abstract = "We present spectral and imaging LOFAR (LOw-Frequency ARray) observations in the 20 – 40 MHz range of solar radio bursts fine structures, such as flag-like, sail-like, and dot-like that appeared on 8 April 2019. These structures were associated with type III solar radio bursts that occurred in the 40 – 80 MHz band. The mean duration and spectral widths of the fine structures range from 1.0 to 3.4 s and from 0.3 to 0.9 MHz, respectively. Additionally, we investigated the radio images of eight fine structures – two flags, two sails and four dots. This allowed us to determine their emission source sizes, which ranged from 240 to 392 arcmin2, and their frequencies from 25.58 to 39.25 MHz as well as their location. They occurred on the east side of the Sun and were most likely associated with an emerging active region NOAA AR 12738, where a weak B1.7 flare was observed.",

keywords = "Bursts, Corona, Fine structures, LOFAR, Radio, Sun",

author = "Bartosz Dabrowski and Aleksandra Wolowska and Christian Vocks and Jasmina Magdaleni{\'c} and Peijin Zhang and Pawel Flisek and Malte Br{\"o}se and Morosan, \{Diana E.\} and Andrzej Krankowski and Adam Fron and Gottfried Mann and Pietro Zucca and Mario Bisi and Richard Fallows and Peter Gallagher and Christophe Marqu{\'e} and Barbara Matyjasiak and Hanna Rothkaehl",

note = "Publisher Copyright: {\textcopyright} The Author(s) 2024.",

year = "2025",

month = feb,

doi = "10.1007/s11600-024-01421-4",

language = "English",

volume = "73",

pages = "987--993",

journal = "Acta Geophysica",

issn = "1895-6572",

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Dabrowski, B, Wolowska, A, Vocks, C, Magdalenić, J, Zhang, P, Flisek, P, Bröse, M, Morosan, DE, Krankowski, A, Fron, A, Mann, G, Zucca, P, Bisi, M, Fallows, R, Gallagher, P, Marqué, C, Matyjasiak, B & Rothkaehl, H 2025, 'Fine structures of a solar type III radio bursts observed with LOFAR', Acta Geophysica, vol. 73, no. 1, pp. 987-993. https://doi.org/10.1007/s11600-024-01421-4

TY - JOUR

T1 - Fine structures of a solar type III radio bursts observed with LOFAR

AU - Dabrowski, Bartosz

AU - Wolowska, Aleksandra

AU - Vocks, Christian

AU - Magdalenić, Jasmina

AU - Zhang, Peijin

AU - Flisek, Pawel

AU - Bröse, Malte

AU - Morosan, Diana E.

AU - Krankowski, Andrzej

AU - Fron, Adam

AU - Mann, Gottfried

AU - Zucca, Pietro

AU - Bisi, Mario

AU - Fallows, Richard

AU - Gallagher, Peter

AU - Marqué, Christophe

AU - Matyjasiak, Barbara

AU - Rothkaehl, Hanna

PY - 2025/2

Y1 - 2025/2

N2 - We present spectral and imaging LOFAR (LOw-Frequency ARray) observations in the 20 – 40 MHz range of solar radio bursts fine structures, such as flag-like, sail-like, and dot-like that appeared on 8 April 2019. These structures were associated with type III solar radio bursts that occurred in the 40 – 80 MHz band. The mean duration and spectral widths of the fine structures range from 1.0 to 3.4 s and from 0.3 to 0.9 MHz, respectively. Additionally, we investigated the radio images of eight fine structures – two flags, two sails and four dots. This allowed us to determine their emission source sizes, which ranged from 240 to 392 arcmin2, and their frequencies from 25.58 to 39.25 MHz as well as their location. They occurred on the east side of the Sun and were most likely associated with an emerging active region NOAA AR 12738, where a weak B1.7 flare was observed.

AB - We present spectral and imaging LOFAR (LOw-Frequency ARray) observations in the 20 – 40 MHz range of solar radio bursts fine structures, such as flag-like, sail-like, and dot-like that appeared on 8 April 2019. These structures were associated with type III solar radio bursts that occurred in the 40 – 80 MHz band. The mean duration and spectral widths of the fine structures range from 1.0 to 3.4 s and from 0.3 to 0.9 MHz, respectively. Additionally, we investigated the radio images of eight fine structures – two flags, two sails and four dots. This allowed us to determine their emission source sizes, which ranged from 240 to 392 arcmin2, and their frequencies from 25.58 to 39.25 MHz as well as their location. They occurred on the east side of the Sun and were most likely associated with an emerging active region NOAA AR 12738, where a weak B1.7 flare was observed.

KW - Bursts

KW - Corona

KW - Fine structures

KW - LOFAR

KW - Radio

KW - Sun

UR - https://www.scopus.com/pages/publications/85201192125

U2 - 10.1007/s11600-024-01421-4

DO - 10.1007/s11600-024-01421-4

M3 - Article

AN - SCOPUS:85201192125

SN - 1895-6572

VL - 73

SP - 987

EP - 993

JO - Acta Geophysica

JF - Acta Geophysica

IS - 1

ER -

Fine structures of a solar type III radio bursts observed with LOFAR

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Keywords

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