Search Publications
An unusual supernova in the error box of the γ-ray burst of 25 April 1998
Piro, L.; Pian, E.; Palazzi, E. +46 more
The discovery of afterglows associated with γ-ray bursts at X-ray, optical and radio wavelengths and the measurement of the redshifts of some of these events, has established that γ-ray bursts lie at extreme distances, making them the most powerful photon-emitters known in the Universe. Here we report the discovery of transient optical emission in…
Indication, from Pioneer 10/11, Galileo, and Ulysses Data, of an Apparent Anomalous, Weak, Long-Range Acceleration
Anderson, John D.; Nieto, Michael Martin; Turyshev, Slava G. +3 more
Radio metric data from the Pioneer 10/11, Galileo, and Ulysses spacecraft indicate an apparent anomalous, constant, acceleration acting on the spacecraft with a magnitude ~8.5×10-8 cm/s2, directed towards the Sun. Two independent codes and physical strategies have been used to analyze the data. A number of potential causes ha…
Auroral radio emissions at the outer planets: Observations and theories
Zarka, Philippe
We review both observational and theoretical aspects of the generation of auroral radio emissions at the outer planets, trying to organize the former in a coherent frame set by the latter. Important results have been obtained in the past few years on these radio emissions at the five magnetized planets, from the observations of Ulysses at Jupiter …
Ulysses' return to the slow solar wind
Forsyth, R.; Balogh, A.; McComas, D. J. +9 more
After ten long years of wandering the uncharted seas, Ulysses returned to his home port of Ithaca. Similarly, after its unprecedented five year odyssey through the previously uncharted regions over the poles of the Sun, the Ulysses spacecraft has returned to the slow, variable solar wind which dominates observations near the ecliptic plane. Solar …
Abundances of Deuterium and Helium-3 in the Protosolar Cloud
Geiss, J.; Gloeckler, G.
The mass spectrometric determinations of the isotopic composition of helium in the solar wind obtained from (1) the Apollo Solar Wind Composition (SWC) experiment, (2) the Ion Composition Instrument (ICI) on the International Sun Earth Explorer 3 (ISEE-3), and (3) the Solar Wind Composition Spectrometer (SWICS) on Ulysses are reviewed and discusse…
Spatial structure of the solar wind and comparisons with solar data and models
Hoeksema, J. T.; Galvin, A. B.; Steinberg, J. T. +10 more
Data obtained by instruments on the Ulysses spacecraft during its rapid sweep through >90° of solar latitude, crossing the solar equator in early 1995, were combined with data obtained near Earth by the Wind spacecraft to study the spatial structure of the solar wind and to compare to different models of the interplanetary magnetic field derive…
Interstellar and Inner Source Pickup Ions Observed with SWICS on ULYSSES
Gloeckler, George; Geiss, Johannes
Many species of pickup ions, both of interstellar origin and from an inner, distributed source have been discovered using data from the Solar Wind Ion Composition Spectrometer (SWICS) on Ulysses. Velocity distribution functions of these ions were measured for the first time over heliocentric distances between 1.35 and 5.4 AU, both at high and low …
Coronal Composition above the Solar Equator and the North Pole as Determined from Spectra Acquired by the SUMER Instrument on SOHO
Schühle, U.; Feldman, U.; Laming, J. M. +1 more
Using spectra obtained by the SUMER instrument on the Solar and Heliospheric Observatory (SOHO) we have determined the composition of the bulk of the coronal plasma in the vicinity of the solar surface over a polar coronal hole and an equatorial region. Our measurements show that although low first ionization potential (FIP) elements are enriched …
Heliospheric tomography using interplanetary scintillation observations 2. Latitude and heliocentric distance dependence of solar wind structure at 0.1-1 AU
Jackson, B. V.; Tokumaru, M.; Kojima, M. +4 more
Interplanetary scintillation is a useful means to measure the solar wind in regions inaccessible to in situ observation. However, interplanetary scintillation measurements involve a line-of-sight integration, which relates contributions from all locations along the line of sight to the actual observation. We have developed a computer assisted tomo…
Galactic Cosmic-Ray Confinement Time: Ulysses High Energy Telescope Measurements of the Secondary Radionuclide 10Be
Connell, J. J.
We report new measurements of the isotopic abundances of the Galactic cosmic-ray isotopes 7Be, 9Be, and radioactive 10Be. These measurements from the Ulysses High Energy Telescope (HET) combine exceptional mass resolution with superior statistics. Measurements of radioisotopes produced as secondaries during cosmic-…