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Langmuir waves asso...
Langmuir waves associated with magnetic holes in the solar wind
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- Boldu, J. J. (författare)
- Uppsala universitet,Institutionen för fysik och astronomi,Swedish Inst Space Phys IRF, S-75121 Uppsala, Sweden.
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- Graham, D. B. (författare)
- Swedish Inst Space Phys IRF, S-75121 Uppsala, Sweden.
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- Morooka, M. (författare)
- Swedish Inst Space Phys IRF, S-75121 Uppsala, Sweden.,Univ Paris Diderot, Univ PSL, Sorbonne Univ, Sorbonne Paris Cite,LESIA,CNRS,Observ Paris, 5 Pl Jules Janssen, F-92195 Meudon, France.
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- Andre, M. (författare)
- Swedish Inst Space Phys IRF, S-75121 Uppsala, Sweden.
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- Khotyaintsev, Yu. V. (författare)
- Swedish Inst Space Phys IRF, S-75121 Uppsala, Sweden.
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- Karlsson, Tomas, 1964- (författare)
- KTH,Rymd- och plasmafysik,KTH Royal Inst Technol, Sch Elect Engn & Comp Sci, Div Space & Plasma Phys, S-11428 Stockholm, Sweden.
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- Soucek, J. (författare)
- Czech Acad Sci, Inst Atmospher Phys, Bocni II 1401, Prague 14100, Czech Republic.
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- Pisa, D. (författare)
- Czech Acad Sci, Inst Atmospher Phys, Bocni II 1401, Prague 14100, Czech Republic.
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- Maksimovic, M. (författare)
- Univ Paris Diderot, Univ PSL, Sorbonne Univ, Sorbonne Paris Cite,LESIA,CNRS,Observ Paris, 5 Pl Jules Janssen, F-92195 Meudon, France.
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(creator_code:org_t)
- EDP Sciences, 2023
- 2023
- Engelska.
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Ingår i: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 674
- Relaterad länk:
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https://doi.org/10.1...
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https://uu.diva-port... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- Context. Langmuir waves (electrostatic waves near the electron plasma frequency) are often observed in the solar wind and may play a role in the energy dissipation of electrons. The largest amplitude Langmuir waves are typically associated with type II and III solar radio bursts and planetary foreshocks. In addition, Langmuir waves not related to radio bursts occur in the solar wind, but their source is not well understood. Langmuir waves have been observed inside isolated magnetic holes, suggesting that magnetic holes play an important role in the generation of Langmuir waves.Aims. We provide the statistical distribution of Langmuir waves in the solar wind at different heliocentric distances. In particular, we investigate the relationship between magnetic holes and Langmuir waves. We identify possible source regions of Langmuir waves in the solar wind, other than radio bursts, by analyzing the local plasma conditions.Methods. We analyzed data from Solar Orbiter's Radio and Plasma Waves (RPW) and Magnetometer (MAG) instruments. We used the triggered electric field snapshots and onboard statistical data (STAT) of the Time Domain Sampler (TDS) of RPW to identify Langmuir waves and investigate their properties. The plasma densities were derived from the spacecraft potential estimated by RPW. The MAG data were used to monitor the background magnetic field and detect magnetic holes, which are defined as regions with an isolated decrease in |B| of 50% or more compared to the background level. The statistical analysis was performed on data from 2020 to 2021, comprising heliocentric distances between 0.5 AU and 1 AU.Results. We show that 78% of the Langmuir waves in the solar wind not connected to radio bursts occur in regions of local magnetic field depletions, including the regions classified as isolated magnetic holes. We also show that the Langmuir waves occur more frequently inside magnetic holes than in any other region in the solar wind, which indicates that magnetic holes are important source regions of solar wind Langmuir waves. We find that Langmuir waves associated with magnetic holes in the solar wind typically have lower amplitudes than those associated with radio bursts.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
Nyckelord
- solar wind
- plasmas
- waves
- Sun
- heliosphere
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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Till lärosätets databas
- Av författaren/redakt...
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Boldu, J. J.
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Graham, D. B.
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Morooka, M.
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Andre, M.
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Khotyaintsev, Yu ...
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Karlsson, Tomas, ...
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visa fler...
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Soucek, J.
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Pisa, D.
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Maksimovic, M.
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- Om ämnet
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- NATURVETENSKAP
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NATURVETENSKAP
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och Fysik
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och Astronomi astrof ...
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- NATURVETENSKAP
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NATURVETENSKAP
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och Fysik
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Astronomy and As ...
- Av lärosätet
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Kungliga Tekniska Högskolan
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Uppsala universitet