Zobrazeno 1 - 10
of 58
pro vyhledávání: '"J. W. Bonnell"'
Autor:
I. Y. Vasko, F. S. Mozer, T. Bowen, J. Verniero, X. An, A. V. Artemyev, S. D. Bale, J. W. Bonnell, J. Halekas, I. V. Kuzichev
Publikováno v:
The Astrophysical Journal Letters, Vol 967, Iss 2, p L31 (2024)
Parker Solar Probe measurements have recently shown that coherent fast magnetosonic and Alfvén ion-cyclotron waves are abundant in the solar wind and can be accompanied by higher-frequency electrostatic fluctuations. In this Letter we reveal the non
Externí odkaz:
https://doaj.org/article/1daf1866b9a6446d904cb4cca0531a95
Autor:
R. P. Sawyer, J. S. Halekas, J. W. Bonnell, L. J. Chen, J. McFadden, K. H. Glassmeier, Y. Harada, A. Stanier
Publikováno v:
Geophysical Research Letters, Vol 50, Iss 16, Pp n/a-n/a (2023)
Abstract The near lunar surface contains small‐scale magnetic field structures that provide a natural test bed for observing plasmas with a non‐zero Hall electric field, as well as potentially facilitating electron‐only reconnection. This study
Externí odkaz:
https://doaj.org/article/02ed7e4f622f4c87aa5ca706300d3cbd
Autor:
Zesen Huang, Nikos Sioulas, Chen Shi, Marco Velli, Trevor Bowen, Nooshin Davis, B. D. G. Chandran, Lorenzo Matteini, Ning Kang, Xiaofei Shi, Jia Huang, Stuart D. Bale, J. C. Kasper, Davin E. Larson, Roberto Livi, P. L. Whittlesey, Ali Rahmati, Kristoff Paulson, M. Stevens, A. W. Case, Thierry Dudok de Wit, David M. Malaspina, J. W. Bonnell, Keith Goetz, Peter R. Harvey, Robert J. MacDowall
Publikováno v:
The Astrophysical Journal Letters, Vol 950, Iss 1, p L8 (2023)
The trace magnetic power spectrum in the solar wind is known to be characterized by a double power law at scales much larger than the proton gyro-radius, with flatter spectral exponents close to −1 found at the lower frequencies below an inertial r
Externí odkaz:
https://doaj.org/article/33c34356d4694432afa015931f33dbf6
Autor:
Nikos Sioulas, Zesen Huang, Chen Shi, Marco Velli, Anna Tenerani, Trevor A. Bowen, Stuart D. Bale, Jia Huang, Loukas Vlahos, L. D. Woodham, T. S. Horbury, Thierry Dudok de Wit, Davin Larson, Justin Kasper, Christopher J. Owen, Michael L. Stevens, Anthony Case, Marc Pulupa, David M. Malaspina, J. W. Bonnell, Roberto Livi, Keith Goetz, Peter R. Harvey, Robert J. MacDowall, Milan Maksimović, P. Louarn, A. Fedorov
Publikováno v:
The Astrophysical Journal Letters, Vol 943, Iss 1, p L8 (2023)
Parker Solar Probe and Solar Orbiter data are used to investigate the radial evolution of magnetic turbulence between 0.06 ≲ R ≲ 1 au. The spectrum is studied as a function of scale, normalized to the ion inertial scale d _i . In the vicinity of
Externí odkaz:
https://doaj.org/article/054401ce922042cfb3265adf540a5a34
Publikováno v:
The Astrophysical Journal, Vol 952, Iss 2, p 154 (2023)
The evolution of plasma entropy and the process of plasma energy redistribution at the collisionless plasma shock front are evaluated based on the high temporal resolution data from the four Magnetospheric Multiscale spacecraft during the crossing of
Externí odkaz:
https://doaj.org/article/b388b040bab4402f81101c8d141d628e
Autor:
S. Karbashewski, O. V. Agapitov, H. Y. Kim, F. S. Mozer, J. W. Bonnell, C. Froment, T. Dudok de Wit, Stuart D. Bale, D. Malaspina, N. E. Raouafi
Publikováno v:
The Astrophysical Journal, Vol 947, Iss 2, p 73 (2023)
Observations of the young solar wind by the Parker Solar Probe (PSP) mission reveal the existence of intense plasma wave bursts with frequencies between 0.05 and 0.20 f _ce (tens of hertz up to ∼300 Hz) in the spacecraft frame. The wave bursts are
Externí odkaz:
https://doaj.org/article/6d1f596ccc6e4292a809664cdd35874d
Autor:
A. J. Hull, C. C. Chaston, J. W. Bonnell, J. R. Wygant, C. A. Kletzing, G. D. Reeves, A. Gerrard
Publikováno v:
Geophysical Research Letters, Vol 46, Iss 15, Pp 8597-8606 (2019)
Abstract The relationship between dispersive Alfvén waves (DAWs), magnetospheric activity, and O+ ion outflow/energy density is examined using measurements from the Van Allen Probes. We show that correlated DAW activity and O+ outflow/energization i
Externí odkaz:
https://doaj.org/article/7d93f01bc71548d0981799f3ac4c9cd1
Publikováno v:
Geophysical Research Letters, Vol 47, Iss 4, Pp n/a-n/a (2020)
Abstract We show that broadband low‐frequency Alfvénic field variations observed in the inner‐magnetosphere from the Van Allen Probes during geomagnetically disturbed intervals are composed of multiscale current sheets, current filaments, flow s
Externí odkaz:
https://doaj.org/article/59016003a1e440a1a446437be3f99d65
Autor:
K. Keika, R. Nakamura, M. Volwerk, V. Angelopoulos, W. Baumjohann, A. Retinò, M. Fujimoto, J. W. Bonnell, H. J. Singer, H. U. Auster, J. P. McFadden, D. Larson, I. Mann
Publikováno v:
Annales Geophysicae, Vol 27, Pp 3009-3017 (2009)
We examine fast plasma flows and magnetic field fluctuations observed by THEMIS at 03:00–03:30 UT on 12 December 2007. All THEMIS probes are situated in the near-Earth plasma sheet (XSM>−10 RE) with 1–2 RE spacecraft separations in azimuthal
Externí odkaz:
https://doaj.org/article/92b9c5aadeb447ea98f2680e4a906758
Autor:
O. Le Contel, A. Roux, C. Jacquey, P. Robert, M. Berthomier, T. Chust, B. Grison, V. Angelopoulos, D. Sibeck, C. C. Chaston, C. M. Cully, B. Ergun, K.-H. Glassmeier, U. Auster, J. McFadden, C. Carlson, D. Larson, J. W. Bonnell, S. Mende, C. T. Russell, E. Donovan, I. Mann, H. Singer
Publikováno v:
Annales Geophysicae, Vol 27, Pp 2259-2275 (2009)
We report on quasi-parallel whistler emissions detected by the near-earth satellites of the THEMIS mission before, during, and after local dipolarization. These emissions are associated with an electron temperature anisotropy α=T⊥e/T||e>1 co
Externí odkaz:
https://doaj.org/article/d4795079a29443cab38894ba3450d9dc