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Plasma sheet fine structure at high latitude
Rème, H.; Kistler, L.; Lennartsson, O. W.
High-resolution ion observations made in recent years, by the TIMAS instrument on the Polar satellite and other instruments, reveal a dynamic and finely structured plasma sheet, at least at high latitude. This study invokes multipoint Cluster observations with the CIS CODIF instruments (ion composition and distribution function) to determine wheth…
Experiencing Venus: Clues to the origin, evolution, and chemistry of terrestrial planets via in-situ exploration of our sister world
Baines, Kevin H.; Crisp, David; Russell, Christopher T. +5 more
We review the current state of knowledge of (1) the origin and evolution of Venus and (2) the photochemical and thermochemical processes occurring in the middle and lower atmosphere there. For each, we review the promise of on-going and planned orbital observations by ESA's Venus Express and Japan's Venus Climate Orbiter missions. We review the ne…
Exploring Venus as a Terrestrial Planet
Esposito, Larry W.; Stofan, Ellen R.; Cravens, Thomas E.
With the search for extra-solar planets in full gear, it has become essential to gain a more detailed understanding of the evolution of the other earth-like planets in our own solar system. Space missions to Venus, including the Soviet Veneras, Pioneer Venus, and Magellan, provided a wealth of information about this planet' enigmatic surface and a…
The Sun - Earth Workshop: A Summary of the Outcome
Culhane, J. L.; Siscoe, G. L.
This special issue includes a set of papers that deal with extended solar activity, the launching of CMEs at the Sun, their propagation through interplanetary space, and the detection and study of the ejecta near Earth and of their interaction with the Earth's magnetic environment. In particular solar events that occurred on 28 October 2003, 6 and…
The puzzling X-ray source in RCW103
Caraveo, P. A.; Bignami, G. F.; Tiengo, A. +2 more
1E 161348-5055 (1E) is a compact object lying at the center of the 2000 year old Supernova Remnant (SNR) RCW103. Its original identification as an isolated, radio-quiet neutron star has been questioned in recent years by the observation of a significant long-term variability, as well as by reports of a possible periodicity at ∼6 hours. Here we rep…
The Cassini Mission at Saturn
Mitchell, Robert T.
The Cassini Mission to Saturn, a joint undertaking by NASA, the European Space Agency, and the Italian Space Agency, is now at about the mid-point of its planned four-year tour of the Saturnian system. Close encounters with Titan and the smaller icy satellites are occurring on schedule, and observations of these bodies along with Saturn's atmosphe…
On anticorrelation of number of coronal bright points with sunspot number during 1996 2006
Karachik, Nina V.; Pevtsov, Alexei A.; Sattarov, Isroil +1 more
Using full disk SOHO/EIT data from 1996 to 2006, we study latitudinal distribution of coronal bright points over a period of one solar cycle. We confirm the presence of two distinct types of coronal bright points, and find that the number of "quiet corona" bright points in high latitudes anticorrelate with solar activity as defined by the sunspot …
A method of determining binary orbits by incorporating long-term observational data
Fu, Y. N.; Ren, S. L.
Early ground based observations accumulated a large amount of long-term data about binary stellar systems. Compared with the data obtained by various present-day techniques, the early data have much lower precision. However, the span of the longer time interval makes these data still irreplaceable in certain astronomical researches. The present wo…
Metal Absorption Profiles from the Central Star of the Planetary Nebula M27 (NGC 6853, PN G060.8-03.6, the Dumbbell): Photospheric and Nebular Line Identifications
McCandliss, Stephan R.; Kruk, Jeffrey
High-resolution spectra of the hot central star of the planetary nebula (CSPN) M27, acquired with the Far Ultraviolet Spectroscopic Explorer (FUSE), have revealed an unusually rich set of narrow molecular hydrogen absorption features. This object is also unique in that the velocity of nebular absorption features are cleanly separated from the velo…
Statistical study of low-energy heliosphere particle fluxes from 1.4 to 5 AU over a solar cycle
Lanzerotti, L. J.; Armstrong, T. P.; Maclennan, C. G. +4 more
Throughout the entire Ulysses mission, the Heliosphere Instrument for Spectra, Composition, and Anisotropy at Low Energies (HI-SCALE) has collected measurements of low-energy interplanetary ions and electrons. Time series of electron, proton, and ion fluxes have been obtained since 1990. We present statistical studies of high-resolution ion and el…