Extreme Ultraviolet Observations from Voyager 1 Encounter with Jupiter

  title={Extreme Ultraviolet Observations from Voyager 1 Encounter with Jupiter},
  author={A. Lyle Broadfoot and Michael J. S. Belton and Peter Z. Takacs and B. R. Sandel and Donald E. Shemansky and Jay B. Holberg and Joseph M. Ajello and Sushil K. Atreya and Thomas M. Donahue and H. Warren Moos and J L Bertaux and Jacques E. Blamont and Darrell F. Strobel and John C. McConnell and Alexander Dalgarno and Richard M. Goody and Michael B. McElroy},
  pages={979 - 982}
Observations of the optical extreme ultraviolet spectrum of the Jupiter planetary system during the Voyager 1 encounter have revealed previously undetected physical processes of significant proportions. Bright emission lines of S III, S IV, and O III indicating an electron temperature of 105 K have been identified in preliminary analyses of the Io plasma torus spectrum. Strong auroral atomic and molecular hydrogen emissions have been observed in the polar regions of Jupiter near magnetic field… 

Jovian upper atmospheric temperature measurement by the Voyager 1 UV spectrometer

The first measurement of the neutral temperature in the exosphere of Jupiter is reported. The observations were carried out by the Voyager 1 Ultraviolet Spectrometer during the solar occultation

Extreme Ultraviolet Observations from the Voyager 2 Encounter with Saturn

Combined analysis of helium (584 angstroms) airglow and the atmospheric occultations of the star δ Scorpii imply a vertical mixing parameter in Saturn's upper atmosphere of K (eddy diffusion

Overview of the Voyager ultraviolet spectrometry results through Jupiter encounter

The Voyager ultraviolet spectrometers (UVS) have been making almost continuous observations, in the 500-A to 1700-A wavelength range, of sources in the solar system and galaxy since launch in 1977.

Voyager 1 Planetary Radio Astronomy Observations Near Jupiter

We report results from the first low-frequency radio receiver to be transported into the Jupiter magnetosphere. We obtained dramatic new information, both because Voyager was near or in Jupiter's

A Remarkable Auroral Event on Jupiter Observed in the Ultraviolet with the Hubble Space Telescope

The time scale and magnitude of the change in the ultraviolet aurora leads us to suggest that the discrete Jovian auroral precipitation is related to large-scale variations in the current system, as is the case for Earth's discrete aurorae.

Identification of Extreme Ultraviolet Emission Lines of the Io Plasma Torus Observed by Hisaki/EXCEED

The sulfur and oxygen ions in the Io plasma torus (IPT), which is located at a distance of ~6 RJ from Jupiter, emit light in various wavelength regions. In particular, radiative cooling in the

Models of Jupiter's Polar Aurora

Auroral emissions from Jupiter have been observed across the photon spectrum including ultraviolet and x-ray wavelengths. UV observations suggest an input flux power of 1013−1014 W for the aurora in

Multispectral observations of Jupiter's aurora




Voyager 1 Planetary Radio Astronomy Observations Near Jupiter

We report results from the first low-frequency radio receiver to be transported into the Jupiter magnetosphere. We obtained dramatic new information, both because Voyager was near or in Jupiter's

Voyager 1: Energetic Ions and Electrons in the Jovian Magnetosphere

The observations of the cosmic-ray subsystem have added significantly to the authors' knowledge of Jupiter's magnetosphere, and the existence of energetic sulfur, sodium, and oxygen nuclei with energies above 7 megaelectron volts per nucleon which were found inside of Io's orbit is found.

Measurements of S II optical emission from the thermal plasma of Jupiter

Photometric observations of the forbidden sulfur lines at 6716 and 6731 A originating in the inner Jovian plasmasphere are reported. They imply a characteristic electron density log/sub 10/: N/sub

Ultraviolet Spectroscopy of Venus: Initial Results from the Pioneer Venus Orbiter

Ultraviolet spectroscopy of the Venus cloud tops reveals absorption features attributed to sulfur dioxide in the atmosphere above the cloud tops, and images of the planet at SO2 absorption wavelengths show albedo features similar to those seen at 3650 angstroms from Mariner 10.

Ultraviolet spectrometer experiment for the Voyager mission

The Voyager Ultraviolet Spectrometer (UVS) is an objective grating spectrometer covering the wavelength range of 500–1700 Å with 10 Å resolution. Its primary goal is the determination of the

Pioneer 10 ultraviolet photometer observations at Jupiter encounter

A two-channel extreme ultraviolet photometer on Pioneer 10 was used to investigate hydrogen and helium emissions from the atmosphere of Jupiter and emissions associated with the Galilean satellites.

The Jupiter System Through the Eyes of Voyager 1

The cameras aboard Voyager 1 have provided a closeup view of the Jupiter system, revealing heretofore unknown characteristics and phenomena associated with the planet's atmosphere and the surfaces of

Ultraviolet Photometer Observations of the Saturnian System

Several interesting cloud and atmospheric features of the Saturn system have been observed by the long-wavelength channel of the two-channel ultraviolet photometer aboard the Pioneer Saturn spacecraft, including a Titan-associated cloud, a ring cloud, and the variation of atmospheric emission across Saturn's disk.