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Radial velocities and iron abundances of field RR Lyraes. I.
Barnes, T. G.; Fernley, J.
We present systemic velocities and iron abundances for 56 RR Lyraes, the majority of which have been observed by the HIPPARCOS satellite. Comparison between our systemic velocities and previous values identifies several binary candidates only one of which, TU UMa, was previously suspected of being a binary. However, spectra of the unusual RR Lyrae…
Mesures de vitesses radiales. VIII. Accompagnement AU sol du programme d'observation du satellite HIPPARCOS
Duflot, M.; Burnage, R.; Genty, V. +2 more
We publish 1879 radial velocities of stars distributed in 105 fields of 4^{\circ} \times 4^{\circ}. We continue the PPO series \cite[(Fehrenbach et al. 1987;]{Feh87} \cite[Duflot et al. 1990, 1992 and 1995),]{Du90} using the Fehrenbach objective prism method. Table 1 only available in electronic form at CDS via to cdsarc.u-strasbg.fr (130.79.128.5…
Radial velocities and iron abundances of field RR Lyraes. II.
Garrido, R.; Solano, E.; Barnes, T. G. +1 more
This is the second of the papers devoted to derive radial velocities and iron abundances of field RR Lyraes observed by HIPPARCOS. Our abundances show good agreement with those in the literature obtained both from photometric (Delta S index) and spectroscopic methods. Binary candidates and stars misclassified as RR Lyraes in the original HIPPARCOS…
Mass determination of astrometric binaries with Hipparcos. I. Theory and simulation
Mignard, F.; Martin, C.; Froeschle, M.
The analysis of the observations of double stars made by the ESA satellite Hipparcos has involved a very specific processing to derive the relevant astrometric parameters. This required to distinguish between several categories of double stars according to the separation and orbital motion. We show that for close pairs with orbital period less tha…
Absolute proper motions for the calibration of the HIPPARCOS proper motion system
Klemola, A. R.; Geffert, M.; Schmoll, J. +1 more
Absolute proper motions of 48 Hipparcos stars in nine fields distributed over the northern hemisphere are presented. The proper motions have been recently used as part of the Bonn program for the extragalactic link of the Hipparcos proper motion system. We describe methods which have led to the absolute proper motions of the major part of the Bonn…
GPM1 - a catalog of absolute proper motions of stars with respect to galaxies
Rybka, S. P.; Yatsenko, A. I.
The description of the first version of the General Compiled Catalogue of Absolute Proper Motions (GPM1) for a sample of HIPPARCOS stars, derived with respect to galaxies within the plan called Catalogue of Faint Stars (KSZ, Deutch 1952), is presented. The principal aim of the GPM1 construction was to provide absolute proper motions of stars to de…
Absolute stellar proper motions with reference to galaxies of the M81 group
Meusinger, H.; Brosche, P.; Odenkirchen, M. +2 more
We report on the measurement of absolute proper motions of stars of magnitude 7 to 14.5 in a 2 deg X 2 deg field in the region of the M81 group of galaxies. This work is part of the Bonn program for the extragalactic link of Hipparcos. The proper motions were determined from a collection of photographic plates covering the time interval from 1894 …
The Potsdam contribution to the extragalactic link of the HIPPARCOS pr oper motion system
Scholz, R. -D.; Schilbach, E.; Hirte, S.
Absolute proper motions of 360 Hipparcos stars in 24 fields well distributed over the northern sky were derived from measurements of photographic plates taken mainly with the Tautenburg Schmidt telescope (134/200/400 cm). In each field (about 10 square degrees) a large number of galaxies was used to link the proper motions to the extragalactic ref…
The Bonn contribution to the extragalactic link of the HIPPARCOS proper motion system.
Tucholke, H. -J.; Brosche, P.; Odenkirchen, M.
In order to calibrate the proper motions of the Hipparcos astrometry satellite, our group has measured accurate absolute proper motions of Hipparcos stars in small fields around optically bright extragalactic radio sources or bright galaxies with star-like features. In addition, we also use fields where relative proper motions are calibrated by me…
Astrometric positions of stars with high proper motions in the Southern Hemisphere
Rousseau, J. M.; Perie, J. P.
Several stars with large proper motions, cited by W.J. Luyten, were included in the preliminary programme for the HIPPARCOS mission. When performing preparatory measurements of plates, difficulties were encountered in identifying certain of these stars when relying only on published coordinates. We have taken advantage of this work which relates t…