Sökning: onr:"swepub:oai:DiVA.org:kth-309797" >
Cross-scale Dynamic...
Cross-scale Dynamics Driven by Plasma Jet Braking in Space
-
- Liu, Chunxin, 1991- (författare)
- KTH,Laserfysik,Beihang Univ, Sch Space & Environm, Beijing, Peoples R China.;Swedish Inst Space Phys, Uppsala, Sweden.;KTH Royal Inst Technol, Space & Plasma Phys, Stockholm, Sweden.
-
- Vaivads, Andris (författare)
- KTH,Rymd- och plasmafysik,KTH Royal Inst Technol, Space & Plasma Phys, Stockholm, Sweden.
-
Khotyaintsev, Y. , V (författare)
-
visa fler...
-
- Fu, H. S. (författare)
- Beihang Univ, Sch Space & Environm, Beijing, Peoples R China.
-
- Graham, Daniel B. (författare)
- Uppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen
-
- Steinvall, Konrad (författare)
- Uppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen,Rymd- och plasmafysik
-
- Liu, Y. Y. (författare)
- Beihang Univ, Sch Space & Environm, Beijing, Peoples R China.
-
- Burch, J. L. (författare)
- Southwest Res Inst, San Antonio, TX USA.
-
visa färre...
-
(creator_code:org_t)
- 2022-02-24
- 2022
- Engelska.
-
Ingår i: Astrophysical Journal. - : American Astronomical Society. - 0004-637X .- 1538-4357. ; 926:2
- Relaterad länk:
-
https://doi.org/10.3...
-
visa fler...
-
https://uu.diva-port... (primary) (Raw object)
-
https://urn.kb.se/re...
-
https://doi.org/10.3...
-
https://urn.kb.se/re...
-
visa färre...
Abstract
Ämnesord
Stäng
- Plasma jets are ubiquitous in space. In geospace, jets can be generated by magnetic reconnection. These reconnection jets, typically at fluid scale, brake in the near-Earth region, dissipate their energies, and drive plasma dynamics at kinetic scales, generating field-aligned currents that are crucial to magnetospheric dynamics. Understanding of the cross-scale dynamics is fundamentally important, but observation of coupling among phenomena at various scales is highly challenging. Here we report, using unprecedentedly high-cadence data from NASA's Magnetospheric Multiscale Mission, the first observation of cross-scale dynamics driven by jet braking in geospace. We find that jet braking causes MHD-scale distortion of magnetic field lines and development of an ion-scale jet front that hosts strong Hall electric fields. Parallel electric fields arising from the ion-scale Hall potential generate intense electron-scale field-aligned currents, which drive strong Debye-scale turbulence. Debye-scale waves conversely limit intensity of the field-aligned currents, thereby coupling back to the large-scale dynamics. Our study can help in understanding how energy deposited in large-scale structures is transferred into small-scale structures in space.
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)
Hitta via bibliotek
Till lärosätets databas