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Introduction to the Ulysses encounter with Jupiter
Smith, Edward J.; Wenzel, Klaus-Peter
The Ulysses spacecraft encountered Jupiter in February 1992, passing within 6.31 radii of the planet. For approximately 8 days it was inside the Jovian magnetosphere, and for several days before and after that, Ulysses was in the interaction regions formed by the solar wind (the magnetosheath and boundary layer). The inbound trajectory was at a ~1…
The First Detection of a Collapsed Core Globular Cluster in M31
Cacciari, C.; Federici, L.; Ferraro, F. R. +6 more
We report on the observations of a globular cluster (designated G105 = Bo 343) in the nearby spiral galaxy M 31, using the Hubble Space Telescope (HST). Image deconvolutions using three different methods indicate that this cluster has a density profile with the morphology characteristic of stellar systems which have undergone core collapse, i.e., …
Three-dimensional particle anisotropies in and near the plasma sheet of Jupiter observed by the EPAC experiment onboard the Ulysses spacecraft
Krupp, N.; Fränz, M.; Dougherty, M. K. +3 more
During its inbound journey into Jupiter's magnetosphere, Ulysses had several encounters with the Jovian plasma sheet near the magnetic equator, which were related with intensity maxima in the energetic particles. We show for the first time anisotropies in three dimensions of three ion species (protons, helium and oxygen) in the energy range 0.24 &…
A Spectroscopic Search for Colliding Stellar Winds in O-Type Close Binary Systems. III. 29 UW Canis Majoris
Wiggs, Michael S.; Gies, Douglas R.
The orbital-phase variations in the optical emission lines and UV P Cygni lines of the massive O-type binary 29 UW Canis Majoris are investigated in a search for evidence of colliding winds. High SNR spectra of the H-alpha and He I 6678-A emission lines are presented, and radial velocity curves for several features associated with the photosphere …
An interpretation of the broadband VLF waves near the Io torus as observed by Ulysses
Kaiser, M. L.; Desch, M. D.; Farrell, W. M. +3 more
The requirements for the Ulysses trajectory to attain high ecliptic latitudes using a Jovian gravitational assist resulted in a fortuitous passage through the Io torus region. Specifically, the spacecraft spend may hours at latitudes just above the torus. During this time the low-frequency cutoff of an ordinary mode (O mode) emission allowed a det…
Wind Variability in the Large Magellanic Cloud B[e] Supergiant HD 34664
Clayton, G. C.; Schulte-Ladbeck, R. E.
We present optical linear spectropolarimetry of the B[e] supergiant HD 34664. The polarization and position angle display significant spectral features which correspond to the Hα and Hβ emission lines. We use the line polarizations to separate the interstellar foreground polarization from the intrinsic polarization of HD 34664. The intrinsic polar…
Ulysses observations of anti-sunward flow on Jovian polar cap field lines
Dougherty, M. K.; Balogh, A.; Forsyth, R. J. +4 more
We examine the energetic (∼MeV) ion data obtained by the Anisotropy Telescopes instrument of the Ulysses COSPIN package during two northern high-latitude excursions prior to closest approach to Jupiter, when the spacecraft left the region of trapped fluxes on closed magnetic field lines at lower latitudes and entered a region of open field lines w…
A Search for Proton Beams during Flares on AU Microscopii
Carpenter, K. G.; Robinson, R. D.; Maran, S. P. +1 more
We report the results of a coordinated observing campaign on the active M dwarf star AU Mic. The purpose of the campaign was to search for evidence of proton beams during the impulsive phase of stellar flares and to determine whether the energy contained in these beams represented a significant fraction of the energy budget of the flare. During a …
Far infrared properties of late type dwarfs. Infrared fluxes of K and M dwarfs.
Doyle, J. G.; Mathioudakis, M.
IRAS fluxes/upper limits are presented for a large sample of K and M dwarfs. Good agreement is found between the 12 micrometer fluxes and those derived from the photospheric models of Mould (1976). Relationships between the optical and infrared colors are derived. The active dMe/dKe stars appear systematically brighter in the infrared compared wit…
Forbidden Velocity Gas Detected in Ultraviolet Interstellar Absorption toward Four Distant Inner Galaxy Stars
Tripp, Todd M.; Sembach, Kenneth R.; Savage, Blair D.
We analyze International Ultraviolet Explorer high-dispersion observations of interstellar absorption toward HD 167402, HD 168941, HD 172140, and HD 173502, four distant, inner Galaxy, lower halo/thick disk stars (2°.3 < 1 < 5°.8, 6°.3 < |b| < 12°.3). On the basis of ultraviolet stellar photospheric and wind lines, we classify HD 16740…