Journal articles
Shock location and CME 3D reconstruction of a solar type II radio burst with LOFAR
P. Zucca
1
D. Morosan
2
P. Rouillard
3
R. Fallows
P. Gallagher
2
J. Magdalenic
K.-L. Klein
4
G. Mann
5
C. Vocks
5
P. Carley
M. Bisi
6
P. Kontar
2
H. Rothkaehl
7
B. Dabrowski
8
A. Krankowski
J. Anderson
A. Asgekar
1
M. Bell
M. Bentum
1
P. Best
R. Blaauw
1
F. Breitling
5
J. Broderick
9
W. Brouw
10
M. Bruggen
11
R. Butcher
B. Ciardi
12
E. Geus
A. Deller
1
S. Duscha
1
J. Eisloffel
13
M. Garrett
14
Jean-Mathias Grießmeier
15, 16
A. Gunst
1
G. Heald
1
M. Hoeft
13
J. Hörandel
17
M. Iacobelli
14
E. Juette
18
A. Karastergiou
19
J. Leeuwen
1
D. Mckay-Bukowski
20
H. Mulder
H. Munk
1
A. Nelles
17
E. Orru
1
H. Paas
1
V. Pandey
R. Pekal
R. Pizzo
1
A. Polatidis
1
W. Reich
21
A. Rowlinson
1
J. Schwarz
A. Shulevski
10
J. Sluman
1
O. Smirnov
C. Sobey
21
M. Soida
S. Thoudam
17
M. Toribio
R. Vermeulen
R. van Weeren
1
O. Wucknitz
22
P. Zarka
4, 16
Jean-Mathias Grießmeier 15, 16
Mail :
Author Employer institution : Université d'Orléans
A. Gunst 1
Author
G. Heald 1
Author
M. Hoeft 13
Author
P. Zarka 4, 16
Mail :
Author
1
ASTRON - Netherlands Institute for Radio Astronomy (Oude Hoogeveensedijk 4, 7991 PD Dwingeloo / PO Box 2, 7990 AA Dwingeloo - Netherlands)
2
Trinity College Dublin (College Green, Dublin 2, Ireland - Ireland)
3
IRAP - Institut de recherche en astrophysique et planétologie (9 avenue Colonel Roche 31028 Toulouse - France)
- CNRS - Centre National de la Recherche Scientifique : UMR5277 (France)
- OMP - Observatoire Midi-Pyrénées (14 avenue Edouard Belin, 31400 TOULOUSE - France)
- Université Fédérale Toulouse Midi-Pyrénées (41 Allée Jules Guesde, 31000 Toulouse - France)
- UT3 - Université Toulouse III - Paul Sabatier (118 route de Narbonne - 31062 Toulouse - France)
- Université Fédérale Toulouse Midi-Pyrénées (41 Allée Jules Guesde, 31000 Toulouse - France)
- INSU - CNRS - Institut national des sciences de l'Univers : UMR5277 (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
4
LESIA (UMR_8109) - Laboratoire d'études spatiales et d'instrumentation en astrophysique (5, place Jules Janssen 92190 MEUDON - France)
- INSU - CNRS - Institut national des sciences de l'Univers (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
- Observatoire de Paris (61 Av de l'Observatoire 75014 PARIS - France)
- PSL - PSL Research University (France)
- UPD7 - Université Paris Diderot - Paris 7 : UMR_8109 (5 rue Thomas-Mann - 75205 Paris cedex 13 - France)
- SU - Sorbonne Université (21 rue de l’École de médecine - 75006 Paris - France)
- CNRS - Centre National de la Recherche Scientifique : UMR8109 (France)
5
AIP - Leibniz-Institut für Astrophysik Potsdam (An der Sternwarte 16, 14482 Potsdam - Germany)
6
RAL - STFC Rutherford Appleton Laboratory (Harwell Campus, Didcot OX11 0FA - United Kingdom)
- STFC - Science and Technology Facilities Council (Polaris House, North Star Avenue, Swindon SN2 1SZ - United Kingdom)
7
CBK - Space Research Centre of Polish Academy of Sciences (Bartycka 18A, 00-716 Warsaw, Poland - Poland)
- PAN - Polska Akademia Nauk (Poland)
8
Space Radio-Diagnostic Research Center [Olsztyn] (University of Warmia and Mazury, Olsztyn, Poland - Poland)
- University of Warmia and Mazury [Olsztyn] (Oczapowskiego 2 str. 10-719 Olsztyn - Poland)
9
School of Physics and Astronomy [Southampton] (Highfield, Southampton SO17 1BJ - United Kingdom)
- University of Southampton (University Road, Southampton SO17 1BJ - United Kingdom)
10
Kapteyn Astronomical Institute [Groningen] (PO Box 800, 9700 AV, Groningen - Netherlands)
- University of Groningen [Groningen] (PO Box 72 , 9700 AB Groningen - Netherlands)
11
UHH - Universität Hamburg (Germany)
12
Max Planck Institute for Astrophysics (Karl-Schwarzschild-Str. 1, 85748 Garching, Germany - Germany)
- Max-Planck-Gesellschaft (Jägerstrasse, 10-11, D-10117 Berlin - Germany)
13
TLS - Thüringer Landessternwarte Tautenburg ( Sternwarte 5, 07778 Tautenburg - Germany)
14
Leiden Observatory [Leiden] (P.O. Box 9513, NL-2300 RA Leiden - Netherlands)
- Universiteit Leiden [Leiden] (P.O. Box 9500 2300 RA Leiden - Netherlands)
15
LPC2E - Laboratoire de Physique et Chimie de l'Environnement et de l'Espace (3A, Avenue de la Recherche Scientifique 45071 Orléans cedex 2 - France)
- OSUC - Observatoire des Sciences de l'Univers en région Centre : UMS3116 (Campus Géosciences, 1A rue de la Férollerie, 45071 Orléans - France)
- INSU - CNRS - Institut national des sciences de l'Univers (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
- Observatoire de Paris (61 Av de l'Observatoire 75014 PARIS - France)
- PSL - PSL Research University (France)
- UO - Université d'Orléans (Château de la Source - Avenue du Parc Floral - BP 6749 - 45067 Orléans cedex 2 - France)
- CNRS - Centre National de la Recherche Scientifique : UMS3116 (France)
- CNES - Centre National d’Études Spatiales [Paris] : UMR 7328 (Siège social : 2 place Maurice Quentin, 75039 Paris - France)
16
USN - Unité Scientifique de la Station de Nançay (18330 NANCAY - France)
- UO - Université d'Orléans : USR 704 (Château de la Source - Avenue du Parc Floral - BP 6749 - 45067 Orléans cedex 2 - France)
- OSUC - Observatoire des Sciences de l'Univers en région Centre (Campus Géosciences, 1A rue de la Férollerie, 45071 Orléans - France)
- INSU - CNRS - Institut national des sciences de l'Univers (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
- Observatoire de Paris (61 Av de l'Observatoire 75014 PARIS - France)
- PSL - PSL Research University (France)
- UO - Université d'Orléans (Château de la Source - Avenue du Parc Floral - BP 6749 - 45067 Orléans cedex 2 - France)
- CNRS - Centre National de la Recherche Scientifique : UMS3116 (France)
- INSU - CNRS - Institut national des sciences de l'Univers : USR 704 (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
- Observatoire de Paris : USR 704 (61 Av de l'Observatoire 75014 PARIS - France)
- PSL - PSL Research University (France)
- CNRS - Centre National de la Recherche Scientifique : USR 704 (France)
17
Radboud university [Nijmegen] (Comeniuslaan 4, 6525 HP Nijmegen - Netherlands)
18
Ruhr-Universität Bochum [Bochum] (Universitätsstraße 150, 44801 Bochum - Germany)
19
Oxford Astrophysics (Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, UK - United Kingdom)
- University of Oxford [Oxford] (Wellington Square, Oxford OX1 2JD - United Kingdom)
20
UiT - University of Tromsø (The Arctic University of Norway, PO Box 6050, Langnes 9037 Tromsø - Norway)
21
MPIFR - Max-Planck-Institut für Radioastronomie (Auf dem Hügel 69 D-53121 Bonn - Germany)
22
AlfA - Argelander-Institut für Astronomie ( Auf dem Hügel 71, 53121 Bonn - Germany)
- Rheinische Friedrich-Wilhelms-Universität Bonn (Regina-Pacis-Weg 3, 53113 Bonn - Germany)
Abstract : Context. Type II radio bursts are evidence of shocks in the solar atmosphere and inner heliosphere that emit radio waves ranging from sub-meter to kilometer lengths. These shocks may be associated with coronal mass ejections (CMEs) and reach speeds higher than the local magnetosonic speed. Radio imaging of decameter wavelengths (20–90 MHz) is now possible with the Low Frequency Array (LOFAR), opening a new radio window in which to study coronal shocks that leave the inner solar corona and enter the interplanetary medium and to understand their association with CMEs.
Aims. To this end, we study a coronal shock associated with a CME and type II radio burst to determine the locations at which the radio emission is generated, and we investigate the origin of the band-splitting phenomenon.
Methods. Thetype II shock source-positions and spectra were obtained using 91 simultaneous tied-array beams of LOFAR, and the CME was observed by the Large Angle and Spectrometric Coronagraph (LASCO) on board the Solar and Heliospheric Observatory (SOHO) and by the COR2A coronagraph of the SECCHI instruments on board the Solar Terrestrial Relation Observatory(STEREO). The 3D structure was inferred using triangulation of the coronographic observations. Coronal magnetic fields were obtained from a 3D magnetohydrodynamics (MHD) polytropic model using the photospheric fields measured by the Heliospheric Imager (HMI) on board the Solar Dynamic Observatory (SDO) as lower boundary.
Results. The type II radio source of the coronal shock observed between 50 and 70 MHz was found to be located at the expanding flank of the CME, where the shock geometry is quasi-perpendicular with θBn ~ 70°. The type II radio burst showed first and second harmonic emission; the second harmonic source was cospatial with the first harmonic source to within the observational uncertainty. This suggests that radio wave propagation does not alter the apparent location of the harmonic source. The sources of the two split bands were also found to be cospatial within the observational uncertainty, in agreement with the interpretation that split bands are simultaneous radio emission from upstream and downstream of the shock front. The fast magnetosonic Mach number derived from this interpretation was found to lie in the range 1.3–1.5. The fast magnetosonic Mach numbers derived from modelling the CME and the coronal magnetic field around the type II source were found to lie in the range 1.4–1.6.
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Journal articles
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https://hal-insu.archives-ouvertes.fr/insu-01862977
Contributor : Nathalie Rouchon <>
Submitted on : Friday, September 20, 2019 - 3:12:38 PM
Last modification on : Tuesday, July 21, 2020 - 4:01:14 AM
Document(s) archivé(s) le : Sunday, February 9, 2020 - 4:03:15 AM
Contributor : Nathalie Rouchon <>
Submitted on : Friday, September 20, 2019 - 3:12:38 PM
Last modification on : Tuesday, July 21, 2020 - 4:01:14 AM
Document(s) archivé(s) le : Sunday, February 9, 2020 - 4:03:15 AM
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Identifiers
- HAL Id : insu-01862977, version 1
- ARXIV : 1804.01025
- BIBCODE : 2018A&A...615A..89Z
- DOI : 10.1051/0004-6361/201732308
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Citation
P. Zucca, D. Morosan, P. Rouillard, R. Fallows, P. Gallagher, et al.. Shock location and CME 3D reconstruction of a solar type II radio burst with LOFAR. Astronomy and Astrophysics - A&A, EDP Sciences, 2018, 615 (A89), pp.A89. ⟨10.1051/0004-6361/201732308⟩. ⟨insu-01862977⟩
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