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Title: Pick-up of cometary protons by the solar wind

Abstract

The High Energy Range Spectrometer (HERS) of the Ion Mass Spectrometer on the Giotto spacecraft measured the 3-dimensional distribution of picked-up cometary protons over a distance of approximately 8 million km upstream of the bow shock of Comet Halley. The protons were observed to be elastically scattered out of their original cycloidal trajectories such that they were nonuniformly distributed over a spherical shell in velocity space. The shell radius (relative to its expected radius) and thickness increased as the bow shock was approached. Downstream of the shock, the cometary protons could not be distinguished from the heated solar wind protons.

Authors:
; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Jet Propulsion Lab., Pasadena, CA (USA)
OSTI Identifier:
6482142
Alternate Identifier(s):
OSTI ID: 6482142
Report Number(s):
N-87-19342; NASA-CR-180212; NAS-1.26:180212
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; HALLEY COMET; PARTICLE KINEMATICS; PROTONS; ELASTIC SCATTERING; EXPERIMENTAL DATA; MASS SPECTROMETERS; PHOTOIONIZATION; SHOCK WAVES; SOLAR WIND; BARYONS; COMETS; DATA; ELEMENTARY PARTICLES; FERMIONS; HADRONS; INFORMATION; IONIZATION; MEASURING INSTRUMENTS; NUCLEONS; NUMERICAL DATA; SCATTERING; SOLAR ACTIVITY; SPECTROMETERS 640107* -- Astrophysics & Cosmology-- Planetary Phenomena

Citation Formats

Neugebauer, M., Lazarus, A.J., Altwegg, K., Balsiger, H., Goldstein, B.E., Goldstein, R., Neubauer, F.M., Rosenbauer, H., Schwenn, R., and Shelley, E.G. Pick-up of cometary protons by the solar wind. United States: N. p., 1987. Web.
Neugebauer, M., Lazarus, A.J., Altwegg, K., Balsiger, H., Goldstein, B.E., Goldstein, R., Neubauer, F.M., Rosenbauer, H., Schwenn, R., & Shelley, E.G. Pick-up of cometary protons by the solar wind. United States.
Neugebauer, M., Lazarus, A.J., Altwegg, K., Balsiger, H., Goldstein, B.E., Goldstein, R., Neubauer, F.M., Rosenbauer, H., Schwenn, R., and Shelley, E.G. Sun . "Pick-up of cometary protons by the solar wind". United States. doi:.
@article{osti_6482142,
title = {Pick-up of cometary protons by the solar wind},
author = {Neugebauer, M. and Lazarus, A.J. and Altwegg, K. and Balsiger, H. and Goldstein, B.E. and Goldstein, R. and Neubauer, F.M. and Rosenbauer, H. and Schwenn, R. and Shelley, E.G.},
abstractNote = {The High Energy Range Spectrometer (HERS) of the Ion Mass Spectrometer on the Giotto spacecraft measured the 3-dimensional distribution of picked-up cometary protons over a distance of approximately 8 million km upstream of the bow shock of Comet Halley. The protons were observed to be elastically scattered out of their original cycloidal trajectories such that they were nonuniformly distributed over a spherical shell in velocity space. The shell radius (relative to its expected radius) and thickness increased as the bow shock was approached. Downstream of the shock, the cometary protons could not be distinguished from the heated solar wind protons.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Mar 01 00:00:00 EST 1987},
month = {Sun Mar 01 00:00:00 EST 1987}
}

Technical Report:
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