Science Archives Publication System

Measurement of 0-25 eV Ions With a Retarding Potential Analyzer on the Cluster Ion Spectroscopy Experiment

DOI: 10.1029/GM102p0097 Bibcode: 1998GMS...102...97M

McCarthy, M. P.; McFadden, J. P.

We describe a retarding potential analyzer (RPA) which extends the energy range of the Cluster ion spectroscopy (CIS) experiment down to 0-25 eV [Rème et al., 1993]. The CIS experiment will make comprehensive measurements of 3D ion distribution functions from 0-40 keV over the broad range of plasma regions the Cluster orbit will traverse. Mass com…

1998 • Geophysical Monograph Series

Cluster 2

Rotationally Broadened Synthetic Spectra for HST and IUE Observations of Exposed White Dwarfs in Cataclysmic Variables

DOI: 10.1086/316108 Bibcode: 1998PASP..110...39N

Sion, E. M.; Nguyen, Quyen; Fabian, Dirk +2 more

In many dwarf novae during quiescence, the underlying white dwarf dominates the flux in the far ultraviolet. By observing these exposed degenerate stars with the Hubble Space Telescope Goddard High Resolution Spectrograph and Faint Object Spectrograph (HST GHRS and FOS), the white-dwarf rotation rates can be determined or constrained by fitting sy…

1998 • Publications of the Astronomical Society of the Pacific

IUE eHST 2

Comment on: “Polar plumes and fine-scale coronal structures — On the interpretation of coronal radio sounding data” by Pätzold and Bird

DOI: 10.1029/98GL00842 Bibcode: 1998GeoRL..25.1849W

Habbal, Shadia Rifai; Woo, Richard

1998 • Geophysical Research Letters

Ulysses 2

Reduction of the Astrographic Catalogue, zone of S. Fernando

DOI: 10.1051/aas:1998294 Bibcode: 1998A&AS..132..275A

Vieira, K.; Abad, C.; Zambrano, A.

The San Fernando Zone of the Astrographic Catalogue is reduced to the HIPPARCOS system in order to test a reduction model previously presented by Abad (1993). A new method for the determination of field distortion and magnitude or color dependent systematic errors on photographic plates is discussed.

1998 • Astronomy and Astrophysics Supplement Series

Hipparcos 2

The microwave sensing in the Cassini Mission : the radar

DOI: 10.1016/S0032-0633(98)00065-8 Bibcode: 1998P&SS...46.1245B

Johnson, W. T. K.; Borgarelli, L.; Im, E. +1 more

The spacecraft of Cassini Mission has been launched towards Saturn on October 1997 to study the physical structure and chemical composition of Saturn as well as all its moons. To this end many instruments have been mounted on the spacecraft ; one of these is the Cassini Radar. Cassini Mission is a cooperative mission between NASA (National Aeronau…

1998 • Planetary and Space Science

Cassini 2

The Hipparcos satellite: a dramatic improvement in our knowledge of the solar neighbourhood.

DOI: 10.1016/S1251-8069(98)80013-4 Bibcode: 1998CRASB.326..775T

Turon, C.

Hipparcos was the first satellite to accurately measure angular displacements on the sky. Thanks to its original design, positions, trigonometric parallaxes and proper motions of unprecedented accuracy have been obtained for about 118000 stars and 50 objects in the solar system. The results cover a wide variety of subjects: reference systems, stel…

1998 • Academie des Sciences Paris Comptes Rendus Serie B Sciences Physiques

Hipparcos 2

AGB Stars in the Magellanic Clouds

DOI: 10.1023/A:1001516614112 Bibcode: 1998Ap&SS.255..379G

Groenewegen, M. A. T.

Some recent results on AGB research in the Magellanic Clouds are reviewed. Discussed are optical and IRAS based surveys, and recent results from the near-infrared DENIS survey, and ISO observations.

1998 • Astrophysics and Space Science

ISO 2

Hydrodynamical Modelling of the Evolution of Dusty Outflows from AGB-Stars

DOI: 10.1023/A:1001566326774 Bibcode: 1998Ap&SS.255..459S

Steffen, M.; Szczerba, R.; Schönberner, D.

1998 • Astrophysics and Space Science

ISO 2

The Structure of the Local Hot Bubble Toward L = 165^o, B = 0^o Using IUE and ROSAT Data

DOI: 10.1007/BFb0104695 Bibcode: 1998LNP...506...65D

de Boer, K. S.; Kerp, J.

The first X-ray-opaque cloud in the direction of Auriga lies at 180 pc. A tenuous cloud, whose distance is derived from IUE absorption line studies as well as from an analysis of ROSAT data, is embedded at 55 pc. The X-ray emitting gas has a temperature of 10^{5.9-6.0} K. The pressure is 1.6 10^4 K cm^{-3}.

1998 • IAU Colloq. 166: The Local Bubble and Beyond

IUE 2

Minor planets ephemerides improvement. From joint analysis of HIPPARCOS and ground-based observations

Bibcode: 1998A&A...331.1113H

Hestroffer, D.; Viateau, B.; Rapaport, M.

Two methods are considered for the improvement of the ephemerides of the asteroids observed by the Hipparcos satellite. They utilize different combinations of ground-based and space-based data. In particular, we develop a method based on an analysis of the variance matrix in the least-squares solution of Hipparcos observations taken alone. Applica…

1998 • Astronomy and Astrophysics

Hipparcos 2