Search Publications
Interplanetary Type III Radio Bursts Observed from High Southern Heliographic Latitudes
Stone, R. G.; Fainberg, J.; Reiner, M. J.
Type III radio bursts observed from high southern latitudes are analyzed for the first time. The continual observation of these radio bursts by Ulysses from after the Jupiter swing-by to 50°S latitude argues for a wide latitudinal directivity of type III radiation. From this high latitude perspective, type III radio sources that lie in the far hem…
Solar Particles Seen by ULYSSES Near 33 deg S Latitude
Simnett, G. M.; Tappin, S. J.
We have analysed the ions and electrons seen by the HI-SCALE instrument on the Ulysses spacecraft in the interval from 21 30 June 1993, ahead of an arrival of the CIR which has dominated the particle environment of Ulysses since July 1992. These particles show velocity dispersion effects usually associated with solar-flare particles. There was no …
Study of distribution functions of interplanetary particles accelerated at co-rotating interaction region at∼5A.U.
Lanzerotti, L. J.; Maclennan, C. G.
We report the results of a study of the 12-hour average distribution functions of high Z nuclei as measured over a 10-day interval on the Ulysses spacecraft at a helioradius of∼5.2 A.U. We use the good time and atomic mass resolution of the composition aperture of the HI-SCALE instrument to determine the form of the distribution functions for C, O…
The Evolution of the Anomalous Component of the Cosmic Rays During the ULYSSES Mission
Sanderson, T. R.; Marsden, R. G.; Trattner, K. J. +1 more
We have studied the evolution of the anomalous cosmic ray component at ULYSSES using observations of the quiet time helium fluxes obtained with the COSPIN Low Energy Telescope during the years from launch in October 1990 to the latest data in 1994. Shown are preliminary results of measurements in the energy range from 4.0 to 19 MeV/n. Following th…
Polar Rain Entry of Galactic Electrons into the Inner Heliosphere?
Christian, E. R.; Cooper, J. F.
The understanding of the relative intensity variations in cosmic ray ions and electrons with respect to solar modulation is a grand challenge for cosmic ray modulation theory. Although effects of the heliospheric neutral sheet, gradient-curvature drifts, and merged interaction regions provide qualitative explanations for observed solar cycle varia…
Ulysses' Race to the Pole: Symposium Summary
Lee, Martin A.
This paper reproduces the Symposium Summary presentation at the 28th ESLAB Symposium on The High Latitude Heliosphere. The summary is not comprehensive but with considerable latitude covers the highlights of the conference. Featured are the observations of the high-speed wind from the growing southern polar coronal hole, new measurements of the in…
The AM CVn Systems: A Bibliographic Search for Clues to Their Cataclysmic Nature
Ulla, A.
The nature of AM CVn, GP Com, CR Boo, and V803 Cen is investigated in detail on the basis of a comprehensive review of all that to-date is known about these systems. They are classified as cataclysmic variables, within these forming the subclass of AM CVn systems; their distinguishing characteristic is an extreme H-deficiency. Besides, they are ve…
Observations of the solar wind from coronal holes
Neugebauer, M.
The solar wind emanating from coronal holes (CH) constitutes a quasi-stationary flow whose properties change only slowly with the evolution of the hole itself. Some of the properties of the wind from coronal holes depend on whether the source is a large polar coronal hole or a small near-equatorial hole. The speed of polar CH flows is usually betw…
The atmospheric composition, extinction and luminosity of the LBV star R71
Stahl, O.; Lennon, D. J.; Kudritzki, R. -P. +1 more
ESO 3.6m Caspec spectra of the LMC luminous blue variable (LBV) taken at minimum have been analysed using NLTE model atmospheres and line formation calculations to derive atmospheric parameters and chemical composition. Using the silicon ionization balance and the hydrogen Balmer lines we deriveT eff =17250, log g=1.80 and a microturbu…
Doppler tomography of O-type binaries: The physical properties of seven systems
Gies, D. R.; Penny, L. R.; Bagnuolo, W. G.
We have analyzed UV photospheric lines of seven O-type binaries, by means of crosscorrelation and Doppler tomographic methods, with the goal of estimating the physical properties of the individual stars. These systems are HD 1337 (AO Cas), HD 47129 (Plaskett's star), HD 57060 (29 UW CMa), HD 37043 (Iota Ori), HD 215835 (DH Cep), HD 152218, and HD …