Parallaxes and proper motions of 12 nearby stars determined with the Sproul 24-in. refractor.

1974 ◽  
Vol 79 ◽  
pp. 974 ◽  
Author(s):  
S. L. Lippincott
Keyword(s):  
Proper Motions ◽  
Nearby Stars

scholarly journals Esiderata for nearby - star quantities observable with small telescope

1986 ◽  
Vol 118 ◽  
pp. 247-249
Author(s):  
W. Gliese
Keyword(s):  
Broad Band ◽  
Radial Velocities ◽  
General Assembly ◽  
New Delhi ◽  
Proper Motions ◽  
Nearby Star ◽  
Small Telescope ◽  
General Catalogue ◽  
Nearby Stars

At the General Assembly of the IAU at New Delhi van Altena reported on the new General Catalogue of Trigonometric Stellar Parallaxes (GCTSP) which was completed recently at the Yale Observatory. Time seems to be ripe now for the compilation of a Third Catalogue of Nearby Stars which will include all objects known to be nearer than 25 parsecs. This catalogue will contain positions, proper motions, radial velocities, spectral types, broad-band photometry, and parallaxes - quantities won by observations.

Parallaxes and proper motions of 12 nearby stars.

1949 ◽  
Vol 55 ◽  
pp. 16 ◽  
Author(s):  
P. van de Kamp ◽  
S. L. Lippincott
Keyword(s):  
Proper Motions ◽  
Nearby Stars

scholarly journals Stellar Kinematics and Galactic Research Involving Proper Motions (Invited Paper)

1974 ◽  
Vol 61 ◽  
pp. 217-220
Author(s):  
S. V. M. Clube
Keyword(s):  
Galactic Structure ◽  
Proper Motions ◽  
Stellar Kinematics ◽  
Pilot Survey ◽  
Nearby Stars

A method of analysing proper motions as observed over all the sky is described. The kinematics of nearby stars derived from the Lick Pilot Survey are discussed, and the consequences to galactic structure examined.

scholarly journals Potentialities of Yale Astrometric Materials

1974 ◽  
Vol 61 ◽  
pp. 99-103
Author(s):  
E. D. Hoffleit
Keyword(s):  
Proper Motions ◽  
Effective Utilization ◽  
Nearby Stars

A brief summary is given of the plate materials and results obtained at Yale since the advent of photographic astrometry. The distributions of plates not yet measured or reduced are indicated and possible supplementary programmes for their effective utilization are discussed. Interest centres chiefly in the following areas:(1) The unmeasured parallax plates.(2) Reduction of the −60° to −70° zone catalogue.(3) The El Leoncito programmes for the determination of both positions and proper motions relative to faint galaxies.(4) The feasibility of a search for intrinsically faint nearby stars with the Yale 40-in. at Cerro Tololo and the 20-in. double astrograph at El Leoncito.

scholarly journals Astrometric Desiderata for Nearby Stars

1986 ◽  
Vol 109 ◽  
pp. 653-667
Author(s):  
Wilhelm Gliese
Keyword(s):  
Proper Motions ◽  
First Line ◽  
Trigonometric Parallax ◽  
Trigonometric Parallaxes ◽  
Nearby Stars

Astrometric desiderata for nearby stars concern, in first line, the parallax measurements, avoidance and elimination of effects of bias in trigonometric parallax programs: Bias towards large proper motions, preference of parallaxes with positive accidental errors, the Malmquist bias. For some of the nearby stars we do not yet know accurate positions, for some other objects no reliable proper motions were measured. Finally, for calibrating color-luminosity relations the necessity to observe further precise trigonometric parallaxes is demonstrated and emphasized.

scholarly journals Completing the Local Sample with Tycho

1998 ◽  
Vol 11 (1) ◽  
pp. 443-443
Author(s):  
R.L. Smart ◽  
R. Pannunzio ◽  
M.G. Lattanzi ◽  
B. Mclean
Keyword(s):  
High Precision ◽  
Spectral Type ◽  
Complete Picture ◽  
Proper Motions ◽  
Nearby Star ◽  
Fundamental Parameters ◽  
Stellar Astronomy ◽  
Local Sample ◽  
Nearby Stars ◽  
Star Field

The Tycho Catalogue contains proper motions and low precision parallaxes with a median precisions of 25 mas, while having high precision B and V magnitudes (median precision of 0.07 and 0.06 respectivly). The number of highparallax stars is quite unexpected, with over 30 previously unreferenced, non-Hipparcos, stars with a parallax >500 mas and over 2000 with a parallax >250 mas. While many of these are probably mistakes, the completeness limit of Tycho and the precise magnitudes provide us with a way to intelligently build a complete picture of the nearby star field. Catalogues of nearby stars provide us with many fundamental parameters in the field of stellar astronomy, but the completness of known stars within say even 8pcs is still underestimated by about 30%, i.e., 50-60 systems (T.J. Henry, CSSS8, ASP Conf Series 64, 1994). In a new program at Torino we are using the Tycho Catalogue to intelligently build a list of possible candidates for a 1Opc volume. Figure 1 shows that Tycho will contain basically all ZAMS to spectral type M3 within 10 pes, M5 to 4pcs and M6 to 2pcs. A comparison of the photometric and Tycho distances provides a list free of giants and systems where binarity has affected the color. This list is then added to the Torino Parallax program where we expect to provide more precise parallaxes.

scholarly journals The RAVE harvest: from the relation between abundances and kinematic of the Milky Way stars to tools for the abundance analysis of the spectra

2013 ◽  
Vol 9 (S298) ◽  
pp. 292-297
Author(s):  
Corrado Boeche ◽  
Keyword(s):  
Milky Way ◽  
Radial Velocities ◽  
Proper Motions ◽  
Chemical Abundances ◽  
Stellar Spectra ◽  
Chemical Gradients ◽  
Single Process ◽  
The Galaxy ◽  
Nearby Stars ◽  
Kinematic Information

AbstractRAVE is a spectroscopic survey of the Milky Way which collected more than 500,000 stellar spectra of nearby stars in the Galaxy. The RAVE consortium analysed these spectra to obtain radial velocities, stellar parameters and chemical abundances. These data, together with spatial and kinematic information like positions, proper motions, and distance estimations, make the RAVE database a rich source for galactic archaeology. I present recent investigations on the chemo-kinematic relations and chemical gradients in the Milky Way disk using RAVE data and compare our results with the Besançon models. I also present the code SPACE, an evolution of the RAVE chemical pipeline, which integrates the measurements of stellar parameters and chemical abundances in one single process.

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