Zobrazeno 1 - 10
of 546
pro vyhledávání: '"Wolfgang, Baumjohann"'
Autor:
Wolfgang Baumjohann, R. A. Treumann
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 9 (2022)
Auroral kilometric radiation (AKR) is the paradigm of intense radio emission from planetary magnetospheres. Being close to the electron gyro frequency and/or its lower harmonics, its observation indicates the non-thermal state of the source plasma. E
Externí odkaz:
https://doaj.org/article/0bb0e75de1ca40cc9b117a0403eb1c74
Autor:
R. A. Treumann, Wolfgang Baumjohann
Publikováno v:
Frontiers in Physics, Vol 9 (2021)
The possibility of generating diffuse radiation in extended astronomical media by plasma turbulence is investigated under the assumption that the turbulence can be understood as an ensemble of small-scale magnetic filaments (narrow current sheets) fo
Externí odkaz:
https://doaj.org/article/5dfe1e0b710b4130a1bb42bb7622980d
Autor:
R. A. Treumann, Wolfgang Baumjohann
Publikováno v:
Frontiers in Physics, Vol 9 (2021)
Externí odkaz:
https://doaj.org/article/b3c9914c2e81406b9d669bd34d541894
Autor:
R. A. Treumann, Wolfgang Baumjohann
Publikováno v:
Frontiers in Physics, Vol 9 (2021)
Particle condensates in general magnetic mirror geometries in high-temperature plasmas may be caused by a discrete resonance with thermal ion-acoustic background noise near mirror points. The resonance breaks the bounce symmetry, temporally locking t
Externí odkaz:
https://doaj.org/article/439748d9115f4b018a7f1686c2f1c486
Autor:
R. A. Treumann, Wolfgang Baumjohann
Publikováno v:
Frontiers in Physics, Vol 9 (2021)
The quantum version of Olbert’s kappa distribution applicable to fermions is obtained. Its construction is straightforward but requires recognition of the differences in the nature of states separated by Fermi momenta. Its complement, the bosonic v
Externí odkaz:
https://doaj.org/article/eed8609637c94d5189d51213c26beb40
Autor:
R. A. Treumann, Wolfgang Baumjohann
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 8 (2021)
Mirror modes in collisionless high-temperature plasmas represent macroscopic high-temperature quasi-superconductors with bouncing electrons in discrete-particle resonance with thermal ion-sound noise contributing to the ion-mode growth beyond quasili
Externí odkaz:
https://doaj.org/article/5a8afac8bc8a4a7fa93d4d52263e1e87
Autor:
R. A. Treumann, Wolfgang Baumjohann
Publikováno v:
Frontiers in Physics, Vol 8 (2020)
The Olbertian partition function is reformulated in terms of continuous (Abelian) fields described by the Landau–Ginzburg action, respectively, Hamiltonian. In order to make some progress, the Gaussian approximation to the partition function is tra
Externí odkaz:
https://doaj.org/article/aae2768e7b524d2385a1bb6cd36c7b84
Publikováno v:
Frontiers in Physics, Vol 8 (2020)
We suggest that pairing of bouncing medium-energy electrons in the auroral upward current region close to the mirror points may play a role in driving the electron cyclotron maser instability to generate an escaping narrow band fine structure in the
Externí odkaz:
https://doaj.org/article/3f172fff1aa34b42baf47e26745e5575
Publikováno v:
Frontiers in Physics, Vol 8 (2020)
This note derives the various forms of entropy of a systems subject to Olbert distributions (generalized Lorentzian probability distributions known as κ-distributions), which are frequently observed, particularly in high-temperature plasmas. The gen
Externí odkaz:
https://doaj.org/article/c1528e183f3849af87850699b7385467
Autor:
Rumi Nakamura, Tsugunobu Nagai, Joachim Birn, Victor A. Sergeev, Olivier Le Contel, Ali Varsani, Wolfgang Baumjohann, Takuma Nakamura, Sergey Apatenkov, Anton Artemyev, Robert E. Ergun, Stephen A. Fuselier, Daniel J. Gershman, Barbara J. Giles, Yuri V. Khotyaintsev, Per-Arne Lindqvist, Werner Magnes, Barry Mauk, Christopher T. Russell, Howard J. Singer, Julia Stawarz, Robert J. Strangeway, Brian Anderson, Ken R. Bromund, David Fischer, Laurence Kepko, Guan Le, Ferdinand Plaschke, James A. Slavin, Ian Cohen, Allison Jaynes, Drew L. Turner
Publikováno v:
Earth, Planets and Space, Vol 69, Iss 1, Pp 1-14 (2017)
Abstract We report on the large-scale evolution of dipolarization in the near-Earth plasma sheet during an intense (AL ~ −1000 nT) substorm on August 10, 2016, when multiple spacecraft at radial distances between 4 and 15 R E were present in the ni
Externí odkaz:
https://doaj.org/article/f74c6b13e64146f7a5051e9333cb2d3c