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Nature of Electrost...
Nature of Electrostatic Fluctuations in the Terrestrial Magnetosheath
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- Perri, Silvia (författare)
- Univ Calabria, Dipartimento Fis, Ponte P Bucci Cubo 31C, I-87036 Arcavacata Di Rende, Italy.
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- Perrone, Denise (författare)
- ASI Italian Space Agcy, Via Politecn SNC, I-00133 Rome, Italy.
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- Roberts, Owen (författare)
- Austrian Acad Sci, Space Res Inst, Schmiedlstr 6, A-8042 Graz, Austria.
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- Settino, Adriana (författare)
- Univ Calabria, Dipartimento Fis, Ponte P Bucci Cubo 31C, I-87036 Arcavacata Di Rende, Italy.
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- Yordanova, Emiliya (författare)
- Uppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen
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- Sorriso-Valvo, Luca (författare)
- Uppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen,CNR, Ist Sci & Tecnol Plasmi, Via Amendola 122-D, I-70126 Bari, Italy.
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- Veltri, Pierluigi (författare)
- Univ Calabria, Dipartimento Fis, Ponte P Bucci Cubo 31C, I-87036 Arcavacata Di Rende, Italy.
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- Valentini, Francesco (författare)
- Univ Calabria, Dipartimento Fis, Ponte P Bucci Cubo 31C, I-87036 Arcavacata Di Rende, Italy.
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Univ Calabria, Dipartimento Fis, Ponte P Bucci Cubo 31C, I-87036 Arcavacata Di Rende, Italy ASI Italian Space Agcy, Via Politecn SNC, I-00133 Rome, Italy. (creator_code:org_t)
- 2021-09-28
- 2021
- Engelska.
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Ingår i: Astrophysical Journal. - : American Astronomical Society. - 0004-637X .- 1538-4357. ; 919:2
- Relaterad länk:
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http://arxiv.org/pdf...
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https://urn.kb.se/re...
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https://doi.org/10.3...
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Abstract
Ämnesord
Stäng
- The high cadence plasma, electric, and magnetic field measurements by the Magnetospheric MultiScale spacecraft allow us to explore the near-Earth space plasma with an unprecedented time and spatial resolution, resolving electron-scale structures that naturally emerge from plasma complex dynamics. The formation of small-scale turbulent features is often associated to structured, non-Maxwellian particle velocity distribution functions that are not at thermodynamic equilibrium. Using measurements in the terrestrial magnetosheath, this study focuses on regions presenting bumps in the power spectral density of the parallel electric field at subproton scales. Correspondingly, it is found that the ion velocity distribution functions exhibit beam-like features at nearly the local ion thermal speed. Ion-cyclotron waves in the ion-scale range are frequently observed at the same locations. These observations, supported by numerical simulations, are consistent with the generation of ion-bulk waves that propagate at the ion thermal speed. This represents a new branch of efficient energy transfer at small scales, which may be relevant to weakly collisional astrophysical plasmas.
Ämnesord
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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