Journal ArticleDOI
ISEE‐1 and ‐2 observations of laminar bow shocks: Velocity and thickness
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TLDR
In this paper, the thickness and velocity of the quasi-perpendicular laminar bow shock were determined for conditions where the Mach number and beta numbers are low and the magnetic field is at large angles to the shock normal.Abstract:
Thirteen bow shock crossings observed by ISEE-1 and -2 have been used to determine the thickness and velocity of the quasi-perpendicular laminar bow shock, i.e., those for which the Mach number and beta are low and the magnetic field is at large angles to the shock normal. The shock velocity ranges from a few kilometers per second to over 100 km/sec for these events. The shock thickness is found to be close to an ion inertial length, about 100 km for the conditions studied herein. In contrast to supercritical shocks, there is approximate equipartition of thermal energy between ions and electrons behind these shocks. Finally, there is a weak correlation between shock thickness and the angle between the interplanetary magnetic field and the shock normal, with more perpendicular shocks being thinner.read more
Citations
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Evolution of ion distributions across the nearly perpendicular bow shock: Specularly and non‐specularly reflected‐gyrating ions
TL;DR: The ion density decreases by up to two orders of magnitude at the forward end of the foot of the bow shock profile, suggesting that the ions are reflected by the shock specularly, and may enhance downstream ion thermalization.
Journal ArticleDOI
Ion and electron heating at collisionless shocks near the critical Mach number
TL;DR: In this article, it is argued that the observed heating is not due to reflected ions but rather to physical processes characteristic of subcritical shocks, and it is pointed out that the shocks examined are all very near the theoretical one-fluid critical Mach number.
Journal ArticleDOI
The structure of oblique subcritical bow shocks: ISEE 1 and 2 observations
M. M. Mellott,E. W. Greenstadt +1 more
TL;DR: In this paper, the authors used ISEE 1 and 2 spacecraft magnetic field data to determine the scale lengths of various elements of shock structure, as well as wavelengths and wave polarizations, in a study of structural elements which include shock ramps and precursor wave trains over a series of oblique, low Mach number terrestrial bow shocks.
Journal ArticleDOI
Interstellar Mapping and Acceleration Probe (IMAP): A New NASA Mission
David J. McComas,E. R. Christian,Nathan A. Schwadron,N. J. Fox,Joseph Westlake,Frederic Allegrini,Frederic Allegrini,Daniel N. Baker,D. A. Biesecker,Maciej Bzowski,George Clark,Christina Cohen,Ian J. Cohen,Maher A. Dayeh,Maher A. Dayeh,R. B. Decker,G. A. de Nolfo,M. I. Desai,M. I. Desai,Robert Ebert,H. A. Elliott,Hans-Jörg Fahr,P. C. Frisch,H. O. Funsten,S. A. Fuselier,S. A. Fuselier,André Galli,Antoinette B. Galvin,Joe Giacalone,Matina Gkioulidou,Fan Guo,Mihaly Horanyi,P. A. Isenberg,P. H. Janzen,L. M. Kistler,Kelly E. Korreck,M. A. Kubiak,Harald Kucharek,Brian A. Larsen,R. A. Leske,Noé Lugaz,Janet G. Luhmann,William H. Matthaeus,Donald G. Mitchell,Eberhard Moebius,Keiichi Ogasawara,Daniel B. Reisenfeld,John D. Richardson,Christopher T. Russell,Justyna M. Sokół,Harlan E. Spence,Ruth M. Skoug,Zoltan Sternovsky,Paweł Swaczyna,Jamey Szalay,Munetoshi Tokumaru,Mark E. Wiedenbeck,Peter Wurz,Gary P. Zank,Eric J. Zirnstein +59 more
TL;DR: The IMAP spacecraft is a simple sun-pointed spinner in orbit about the Sun-Earth L1 point as discussed by the authors, and it provides detailed observations of solar wind electrons and ions; suprathermal, pickup, and energetic ions; and the interplanetary magnetic field.
Journal ArticleDOI
Density-Transition Scale at Quasiperpendicular Collisionless Shocks
TL;DR: Measurements of a spacecraft floating potential are used as a proxy for electron plasma density to study, for the first time, the macroscopic density transition scale at 98 crossings of the quasiperpendicular terrestrial bow shock.
References
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Journal ArticleDOI
Longitudinal Ion Oscillations in a Hot Plasma
Burton D. Fried,Roy W. Gould +1 more
TL;DR: In this article, a Vlasov equation description of the plasma is used to explore the properties of longitudinal waves in a hot plasma, including electron and ion plasma oscillations, which are not likely to be observable due to their strongly damped properties.
Journal ArticleDOI
The ISEE 1 and 2 Fluxgate Magnetometers
TL;DR: The ISEE 1 and 2 spacecraft have 12-bit analog-to-digital conversion plus averaging to return 16-bit overlapped averages with a particularly attractive transfer function.
Journal ArticleDOI
Discontinuities in the solar wind
D. S. Colburn,Charles P. Sonett +1 more
TL;DR: In this paper, the existence of a field of MHD discontinuities in the solar wind should make possible the generation of ensembles of shocks and contact surfaces, which can be treated as shock wave or contact surface.
Journal ArticleDOI
OGO-A magnetic field observations
TL;DR: Magnetic field observations by OGO-A, with profiles of bow shock and magnetopause encounters as mentioned in this paper, were used to study the magnetic field of the bow shock. But the results were limited.
Journal ArticleDOI
ISEE-1 and ISEE-2 Fast Plasma Experiment and the ISEE-1 Solar Wind Experiment
S. J. Bame,J. R. Asbridge,H. E. Felthauser,J. P. Glore,G. Paschmann,P. Hemmerich,K. Lehmann,H. Rosenbauer +7 more
TL;DR: Identical fast plasma experiment (FPE) systems were placed on the ISEE-1 and IsEE-2 spacecraft to measure solar-wind ions with high resolution.
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