Zobrazeno 1 - 10
of 171
pro vyhledávání: '"J. D. Scudder"'
Autor:
N. C. Maynard, J. Moen, W. J. Burke, M. Lester, D. M. Ober, J. D. Scudder, K. D. Siebert, D. R. Weimer, C. T. Russell, A. Balogh
Publikováno v:
Annales Geophysicae, Vol 22, Pp 2917-2942 (2004)
We demonstrate that high-resolution 557.7-nm all-sky images are useful tools for investigating the spatial and temporal evolution of merging on the dayside magnetopause. Analysis of ground and satellite measurements leads us to conclude that high-
Externí odkaz:
https://doaj.org/article/0972cecd16f94e358b5163fd34099d92
Autor:
N. C. Maynard, W. J. Burke, J. D. Scudder, D. M. Ober, G. L. Siscoe, W. W. White, K. D. Siebert, D. R. Weimer, G. M. Erickson, J. Schoendorf, M. A. Heinemann
Publikováno v:
Annales Geophysicae, Vol 22, Pp 2151-2169 (2004)
We present observations from the Polar satellite that confirm the existence of two types of depletion layers predicted under southward interplanetary magnetic field (IMF) conditions in magnetohydrodynamic simulations. The first depletion type occu
Externí odkaz:
https://doaj.org/article/8518f7e23e704661a4c7612c6db0eb16
Autor:
N. C. Maynard, D. M. Ober, W. J. Burke, J. D. Scudder, M. Lester, M. Dunlop, J. A. Wild, A. Grocott, C. J. Farrugia, E. J. Lund, C. T. Russell, D. R. Weimer, K. D. Siebert, A. Balogh, M. Andre, H. Rème
Publikováno v:
Annales Geophysicae, Vol 21, Pp 2233-2258 (2003)
Magnetic merging on the dayside magnetopause often occurs at high latitudes. Polar measured fluxes of accelerated ions and wave Poynting vectors while skimming the subsolar magnetopause. The measurements indicate that their source was located t
Externí odkaz:
https://doaj.org/article/5427adbd38e44462aecc31401a31fca1
Publikováno v:
Nonlinear Processes in Geophysics, Vol 6, Iss 3/4, Pp 195-204 (1999)
The orbit of the Polar spacecraft has been ideally suited for studying the turbulent region of the cusp that is located near or just outside the magnetopause current sheet at 7-9 RE. The wave data obtained in this region show that electromagnetic tur
Externí odkaz:
https://doaj.org/article/1b71bfee054c481191ff9566cb5fc24a
Autor:
J. D. Scudder
Publikováno v:
Journal of Geophysical Research: Space Physics. 126
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::56f6b621ef08e526f882ffa2688b5ff5
https://doi.org/10.1029/2020ja028619
https://doi.org/10.1029/2020ja028619
Autor:
J. D. Scudder
Publikováno v:
The Astrophysical Journal. 907:90
Quality metrics for Spitzer–Härm and Grad closures are presented based on the percentage of the heat flux moment supported only by nonnegative, physical, phase space densities underlying the closure. The Spitzer and Grad qualities exceed 95% for t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::508723b3a113ac9613ae86d02dcfece6
https://doi.org/10.3847/1538-4357/abc475
https://doi.org/10.3847/1538-4357/abc475
Autor:
F. M. Muzamil, William Denig, Roy B. Torbert, Per Even Sandholt, F. S. Mozer, Charlie J. Farrugia, J. D. Scudder, Christopher T. Russell, P. R. Pritchett, Lynn B. Wilson
Publikováno v:
Journal of Geophysical Research: Space Physics. 119:7343-7362
We present Polar observations of a reconnection layer during an inbound pass at high northern latitudes. The interplanetary field of 20 nT pointed strongly northward continuously for 13 h. Reverse polar cap convection observed repeatedly by the DMSP
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0ff1bd4a60c357f9eb7d960e1a3c4106
https://doi.org/10.1002/2014ja019879
https://doi.org/10.1002/2014ja019879
Autor:
J. D. Scudder
Publikováno v:
The Astrophysical Journal. 885:148
Coronal and solar wind physics have long used plasma fluid models to motivate physical explanations of observations; the hypothesized model is introduced into a fluid simulation to see if observations are reproduced. This procedure is called Verifica
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f75a40e385704e8a08cc167cd0c7ceb8
https://doi.org/10.3847/1538-4357/ab48e0
https://doi.org/10.3847/1538-4357/ab48e0
Autor:
J. D. Scudder
Publikováno v:
The Astrophysical Journal. 885:138
A Steady Electron Runaway Model (SERM) is formulated describing plasmas in the astrophysical “condition” having finite (rather than infinitesimal) Knudsen number, , suggesting an omnipresent leptokurtic, nonthermal, and heat-conducting electron v
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::14f90eb9d0e086a1ee577dea9af4a6b9
https://doi.org/10.3847/1538-4357/ab4882
https://doi.org/10.3847/1538-4357/ab4882
Autor:
J. D. Scudder
Publikováno v:
The Astrophysical Journal. 882:146
The t hermal force (TF) is an exchange force mediated by Coulomb collisions between electrons and ions in a heat-conducting astrophysical plasma, is one of three, non-inertial, balancing terms in the parallel component of the generalized Ohm’s law,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f6190469bac9780c83e48096a7124a30
https://doi.org/10.3847/1538-4357/ab3348
https://doi.org/10.3847/1538-4357/ab3348