Zobrazeno 1 - 10
of 417
pro vyhledávání: '"G. LAPENTA"'
Autor:
Bala Poduval, R. L. McPherron, R. Walker, M. D. Himes, K. M. Pitman, A. R. Azari, C. Shneider, A. K. Tiwari, S. Kapali, G. Bruno, M. K. Georgoulis, O. Verkhoglyadova, J. E. Borovsky, G. Lapenta, J. Liu, T. Alberti, P. Wintoft, S. Wing
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 10 (2023)
In the domain of space science, numerous ground-based and space-borne data of various phenomena have been accumulating rapidly, making analysis and scientific interpretation challenging. However, recent trends in the application of artificial intelli
Externí odkaz:
https://doaj.org/article/e54dddaf404647708dd8ff69401c3775
Autor:
L. Pezzini, A. N. Zhukov, F. Bacchini, G. Arrò, R. A. López, A. Micera, M. E. Innocenti, G. Lapenta
Publikováno v:
The Astrophysical Journal, Vol 975, Iss 1, p 37 (2024)
The expanding solar wind plasma ubiquitously exhibits anisotropic nonthermal particle velocity distributions. Typically, proton velocity distribution functions (VDFs) show the presence of a core and a field-aligned beam. Novel observations made by th
Externí odkaz:
https://doaj.org/article/30e7b868f37f4ede9ee65a17452f17d6
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 271, Iss 2, p 63 (2024)
In this paper, we introduce and discuss an exactly energy-conserving particle-in-cell method for arbitrary curvilinear coordinates. The flexibility provided by curvilinear coordinates enables the study of plasmas in complex-shaped domains by aligning
Externí odkaz:
https://doaj.org/article/573948a9ac4c490b98956291c2d2ae85
Publikováno v:
Annales Geophysicae, Vol 39, Pp 861-881 (2021)
In magnetospheric missions, burst-mode data sampling should be triggered in the presence of processes of scientific or operational interest. We present an unsupervised classification method for magnetospheric regions that could constitute the first s
Externí odkaz:
https://doaj.org/article/2614606861224b22841ba8e304d3747e
Autor:
C. Philippe Escoubet, K.-J. Hwang, S. Toledo-Redondo, L. Turc, S. E. Haaland, N. Aunai, J. Dargent, Jonathan P. Eastwood, R. C. Fear, H. Fu, K. J. Genestreti, Daniel B. Graham, Yu V. Khotyaintsev, G. Lapenta, Benoit Lavraud, C. Norgren, D. G. Sibeck, A. Varsani, J. Berchem, A. P. Dimmock, G. Paschmann, M. Dunlop, Y. V. Bogdanova, Owen Roberts, H. Laakso, Arnaud Masson, M. G. G. T. Taylor, P. Kajdič, C. Carr, I. Dandouras, A. Fazakerley, R. Nakamura, Jim L. Burch, B. L. Giles, C. Pollock, C. T. Russell, R. B. Torbert
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 6 (2020)
When the supersonic solar wind encounters the Earth's magnetosphere a shock, called bow shock, is formed and the plasma is decelerated and thermalized in the magnetosheath downstream from the shock. Sometimes, however, due to discontinuities in the s
Externí odkaz:
https://doaj.org/article/b6152321939f425a81b2eb8cfee4636e
Publikováno v:
Nonlinear Processes in Geophysics, Vol 21, Iss 2, Pp 539-553 (2014)
The state of the art in the forecast of the background solar wind speed and of the interplanetary magnetic field at Earth is based on the use as boundary conditions for heliospheric models of the input data provided by solar observations. Magnetogram
Externí odkaz:
https://doaj.org/article/cd7c5cbd0ca5470c819ed15de5bb463c
Autor:
G. Lapenta, A. Lazarian
Publikováno v:
Nonlinear Processes in Geophysics, Vol 19, Iss 2, Pp 251-263 (2012)
Astrophysical fluids are generally turbulent and this preexisting turbulence must be taken into account for models of magnetic reconnection in astrophysical, solar or heliospheric environments. In addition, reconnection itself induces turbulence whic
Externí odkaz:
https://doaj.org/article/99125668729e44a3bf2d6bf790e440a1
Publikováno v:
Nonlinear Processes in Geophysics, Vol 19, Iss 1, Pp 145-153 (2012)
The kinetic features of plasmoid chain formation and evolution are investigated by two dimensional Particle-in-Cell simulations. Magnetic reconnection is initiated in multiple X points by the tearing instability. Plasmoids form and grow in size by co
Externí odkaz:
https://doaj.org/article/4d9b8d29065d44319dcfc78ee99f0add
Autor:
G. Lapenta, A. L. Restante
Publikováno v:
Annales Geophysicae, Vol 26, Pp 3049-3060 (2008)
The effect of viscosity and of converging flows on the formation of blobs in the slow solar wind is analysed by means of resistive MHD simulations. The regions above coronal streamers where blobs are formed (Sheeley et al., 1997) are simulated us
Externí odkaz:
https://doaj.org/article/35d97f42797149fd81f60e550221b10d
Autor:
G. Lapenta, J. U. Brackbill
Publikováno v:
Nonlinear Processes in Geophysics, Vol 7, Iss 3/4, Pp 151-158 (2000)
Simulations in three dimensions of a Harris current sheet with mass ratio, mi/me = 180, and current sheet thickness, pi/L = 0.5, suggest the existence of a linearly unstable oblique mode, which is independent from either the drift-kink or the tearing
Externí odkaz:
https://doaj.org/article/161f0d2a9abe48569e410e55d2c450cf