Sign on

SAO/NASA ADS Astronomy Abstract Service


· Find Similar Abstracts (with default settings below)
· Full Refereed Journal Article (PDF/Postscript)
· Full Refereed Scanned Article (GIF)
· PDS Information
· References in the article
· Citations to the Article (33) (Citation History)
· Refereed Citations to the Article
· Reads History
·
· Translate This Page
Title:
Voyager observations of lower hybrid noise in the Io plasma torus and anomalous plasma heating rates
Authors:
Barbosa, D. D.; Coroniti, F. V.; Kurth, W. S.; Scarf, F. L.
Affiliation:
AA(California, University, Los Angeles, CA), AB(California, University, Los Angeles, CA), AC(Iowa, University, Iowa City, IA), AD(TRW, Inc., TRW Space and Technology Group, Redondo Beach, CA)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 289, Feb. 1, 1985, p. 392-408. (ApJ Homepage)
Publication Date:
02/1985
Category:
Lunar and Planetary Exploration; Satellites of Jupiter
Origin:
STI
NASA/STI Keywords:
Io, Plasma Heating, Plasma Waves, Plasma-Particle Interactions, Toroidal Plasmas, Electric Fields, Electrical Measurement, Heat Transfer, Jupiter Satellites, Planetology, Plasma Physics, Voyager 1 Spacecraft
Keywords:
JUPITER, SATELLITES, IO, VOYAGER MISSIONS, OBSERVATIONS, PLASMA TORUS, HEATING, ELECTRIC FIELDS, PLASMA WAVE INSTRUMENT, ANALYSIS, SPECTRA, NOISE, SULFUR, OXYGEN, WAVES, INTENSITY, DOPPLER OBSERVATIONS, IONS, THEORETICAL STUDIES, DISTRIBUTION, MODELS, DENSITY, ELECTRONS
DOI:
10.1086/162899
Bibliographic Code:
1985ApJ...289..392B

Abstract

A study of Voyager 1 electric field measurements obtained by the plasma wave instrument in the Io plasma torus has been carried out. A survey of the data has revealed the presence of persistent peaks in electric field spectra in the frequency range 100-600 Hz consistent with their identification as lower hybrid noise for a heavy-ion plasma of sulfur and oxygen. Typical wave intensities are 0.1 mV/m, and the spectra also show significant Doppler broadening, Delta omega/omega approximately 1. A theoretical analysis of lower hybrid wave generation by a bump-on-tail ring distribution of ions is given. The model is appropriate for plasmas with a superthermal pickup ion population present. A general methodology is used to demonstrate that the maximum plasma heating rate possible through anomalous wave-particle heat exchange is less than approximately 10 to the -14th ergs per cu cm per s. Although insufficient to meet the power requirement of the EUV-emitting warm torus, the heating rate is large enough to maintain a low-density (0.01-0.1 percent) superthermal electron population of keV electrons, which may lead to a small but significant anomalous ionization effect.

Printing Options

Print whole paper
Print Page(s) through

Return 600 dpi PDF to Acrobat/Browser. Different resolutions (200 or 600 dpi), formats (Postscript, PDF, etc), page sizes (US Letter, European A4, etc), and compression (gzip,compress,none) can be set through the Printing Preferences



More Article Retrieval Options

HELP for Article Retrieval


Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)


Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints