scholarly journals Double Star Recognition

1992 ◽  
Vol 9 ◽  
pp. 423-423
Author(s):  
M. Frœschle ◽  
F. Mignard ◽  
J.L. Falin
Keyword(s):  
Statistical Tests ◽  
Real Data ◽  
Double Star ◽  
Field Of View ◽  
Double Stars ◽  
Signal Parameters ◽  
Multiple Stars ◽  
Double And Multiple Stars ◽  
Stellar Source

AbstractHipparcos observations provide a wealthy source of discovery of new double and multiple stars. We have developed adequate procedures to recognize in the signal parameters the multiplicity of the stellar source passing through the Hipparcos field of view. These procedures are outlined together with the design of the statistical tests employed. Sampling on real data indicates that about 6000 new double stars will be detected at the mission completion.

scholarly journals Double Star Astrometry with the Hipparcos Data

1995 ◽  
Vol 166 ◽  
pp. 69-76
Author(s):  
F. Mignard
Keyword(s):  
Position Angle ◽  
Double Star ◽  
Recognition Procedure ◽  
Double Stars ◽  
Multiple Stars ◽  
Relative Coordinates ◽  
Double And Multiple Stars

As we approach the final processing of the observations carried out by HIPPARCOS, in particular for the double and multiple stars, it is possible to provide reliable statistics on the number of such objects detected and on the quality of the relative and absolute astrometry and photometry. About 24 000 stars have been recognized as non-single, including 11 000 already known as double and multiple before the mission and 13000 discovered by Hipparcos. Also, a subset of 16 000 stars among the 24 000 have been successfully solved for their relative coordinates (position angle and separation) with an accuracy in the range of 3 to 30 mas, including 7000 new double stars. I outline in this paper the principle of the internal recognition procedure and present some statistics on the solution.

scholarly journals HIPPARCOS First Results in the Double Star Processing by the FAST Consortium

1992 ◽  
Vol 135 ◽  
pp. 403-411
Author(s):  
F. Mignard ◽  
M. Badiali ◽  
P.L. Bernacca ◽  
H. Bernstein ◽  
D. Cardini ◽  
...  
Keyword(s):  
Position Angle ◽  
Double Star ◽  
Double Stars ◽  
Multiple Stars ◽  
Relative Coordinates ◽  
First Results ◽  
Double And Multiple Stars ◽  
Quantitative Results ◽  
One Year

AbstractAfter the processing of one year of observations carried out by HIPPARCOS it is possible to provide quantitative results as to the number of new double and multiple stars to be detected and the real capacity of this mission to perform relative astrometry on double stars. We present and discuss the methods developed to this end and include the first results concerning the detection statistics and the determination of separation and position angle for double stars. About 16,000 stars have been recognized as non-single, including 9,000 already known as double and mutliple before the mission. Also, a subset of 10,500 stars have been successfully solved for their relative coordinates with an accuracy in the range of 3 to 10 mas.

scholarly journals Classical Observations of Visual Binary and Multiple Stars

2006 ◽  
Vol 2 (S240) ◽  
pp. 88-96
Author(s):  
Brian D. Mason
Keyword(s):  
Field Work ◽  
Speckle Interferometry ◽  
Double Star ◽  
The Past ◽  
Multiple Stars ◽  
Successful Work ◽  
Different Types ◽  
Star Database ◽  
Double And Multiple Stars ◽  
Types Of Information

AbstractChanges in the double star database are highlighted, describing various methods of observation (both historically and those of the past few years) and their effectiveness in different regimes of separation space. The various niches for wide- and narrow-field work as they apply to double and multiple stars are examined and the different types of information which each can provide are described. Despite the significant growth of the double star database, much can still be done, such as finding lost pairs, filling in missing parameters so that observing programs can select all stars appropriate to their capabilities, or providing at least gross kinematic descriptions. After more than 20 years of successful work, speckle interferometry and conventional CCD astrometry have replaced filar micrometry and photography as preferred classical techniques. Indeed, most work in filar micrometry is now being done by amateurs. Work on pairs described as neglected in the last major WDS data release (2001) is given as a specific example. Finally, the continued need to publish data in classical double star parameters is also discussed.

scholarly journals Dynamic study of possible host stars for extrasolar planetary systems

2014 ◽  
Vol 9 (S310) ◽  
pp. 104-105 ◽  
Author(s):  
N. A. Shakht ◽  
L. G. Romanenko ◽  
D. L. Gorshanov ◽  
O. O. Vasilkova
Keyword(s):  
Planetary Systems ◽  
Dynamic Study ◽  
Stellar Systems ◽  
The Sun ◽  
Solar Mass ◽  
Double Stars ◽  
Multiple Stars ◽  
Double And Multiple Stars ◽  
Host Stars

AbstractWe present the stellar systems which consist of double and multiple stars with distances 3.5 ÷ 25 pc from the Sun, belonging to spectral classes F, G, K, M, having masses from 0.3 to 1.5 solar mass and can, in principle, possess planetary systems. On the basis of observations with Pulkovo 65 cm refractor the relative positions of double stars, the parameters of motion, the orbits and also the ephemeris for the nearest epochs have been computed.

scholarly journals The Catalogue of the Components of Double and Multiple Stars (CCDM) - First Edition

1995 ◽  
Vol 166 ◽  
pp. 395-395 ◽  
Author(s):  
J. Dommanget ◽  
O. Nys
Keyword(s):  
Data Base ◽  
Multiple Star ◽  
Multiple Systems ◽  
Double Stars ◽  
Multiple Stars ◽  
Double And Multiple Stars ◽  
General Data ◽  
Input Catalogue ◽  
Better Than

The Hipparcos mission required the realisation of an Input Catalogue giving the positions of 100.000 stars (single or components of double and multiple systems) to an accuracy better than 1″5. At the start of this work (1981) no specific catalogue of double and multiple stars provided these data. The only general data base on double stars available to us, giving positions to ±1′, was the Index (1961,0) updated at the USNO by C. E. Worley till 1976,5 and of which a copy was communicated by P. Muller of the Observatoire de Meudon. It has then been decided to reformat this Catalogue in such a way as to allow the introduction of all necessary information for the mission. This permitted a correct cross-identification with the Hipparcos Input Catalogue (of finally 118.000 stars). It was later called: the Catalogue of the Components of Double and Multiple stars (CCDM). Since then, it has been developed and its aim remains to furnish the best accurate locations and descriptions of the double and multiple systems on the sky for all double and multiple star research.

scholarly journals Raw Data from HIPPARCOS Double and Multiple Stars

1992 ◽  
Vol 135 ◽  
pp. 396-402 ◽  
Author(s):  
P.L. Bernacca ◽  
F. Donati ◽  
F. Mignard
Keyword(s):  
Data Analysis ◽  
Field Of View ◽  
Raw Data ◽  
Multiple Stars ◽  
Double And Multiple Stars ◽  
Input Catalogue ◽  
Fourier Model

AbstractThe HIPPARCOS Input Catalogue comprises about 118,000 entries of which 16,000 are flagged as related to double or multiple stars. Data analysis begins by fitting Fourier model signals to the observations: the intensity coefficients and the phases at several locations on the spatial modulator are estimated and a first rough recognition of possibly unknown non-single stars is performed. After calibration corrections, a normal point is produced at every transit of a star across the field of view of the telescope and the improved parameters are stored for extensive multiplicity testing and relative astrometry when enough scans are accumulated.

scholarly journals How Double Star Astronomy May Develop After HIPPARCOS

1992 ◽  
Vol 135 ◽  
pp. 435-438
Author(s):  
J. Dommanget ◽  
P. Lampens
Keyword(s):  
Double Star ◽  
Multiple Stars ◽  
Hipparcos Catalogue ◽  
Double And Multiple Stars ◽  
Celestial Bodies ◽  
Input Catalogue

AbstractNow that the HIPPARCOS satellite safely revolves on its “degraded” orbit — after the exploit of the ESA technicians to rescue it from the faulty ignition of its apogeum boost motor — and regularly provides the information expected for reaching the initial aim of the project, one may turn to examine the possible exploitation of the final HIPPARCOS Catalogue.In the present paper, we describe how double and multiple stars have been introduced in the Input Catalogue and what may be expected from their observation. We also try to evaluate how much the final HIPPARCOS data may influence future researches on these celestial bodies and what kind of ground–based observation programmes should be conducted in order to support the space results.

scholarly journals HIPPARCOS First Results in the Double Star Photometry

1992 ◽  
Vol 135 ◽  
pp. 421-428
Author(s):  
F. Mignard ◽  
J.L. Falin ◽  
M. Froeschlé
Keyword(s):  
Double Star ◽  
Multiple Systems ◽  
Double Stars ◽  
Multiple Stars ◽  
Accuracy And Precision ◽  
First Results ◽  
Main Detector ◽  
Input Catalogue ◽  
Magnitude Difference ◽  
Better Than

AbstractIn addition to its astrometric capabilities the HIPPARCOS main detector proves to be a good phototometer. The main features of the photometric reduction applied to double stars are outlined. We show how it is possible to discriminate single stars from multiple stars from the photometric signal. Results presented are based on about 16000 stars recognized as non-single, of which 8000 were not known to be double in the HIPPARCOS Input Catalogue. Magnitudes for multiple systems as a whole are derived with a precision usually better than 0.005 mag while the magnitude of each component is recovered up to magnitude difference of 3 mag, but with less accuracy and precision.

scholarly journals Micrometer measurements of double stars

2000 ◽  
pp. 25-31
Author(s):  
D.J. Zulevic ◽  
G.M. Popovic ◽  
R. Pavlovic
Keyword(s):  
Double Stars ◽  
Multiple Stars ◽  
Double And Multiple Stars

A set of 71 measurements of double and multiple stars, carried out with the Large Zeiss Refractor 65/1055 cm of the Belgrade Observatory, is communicated. The bulk of these measurements, 41 in all, unpublished yet, is due to late D. Zulevic.

scholarly journals Commission 26: Double and Multiple Stars

2005 ◽  
Vol 1 (T26A) ◽  
pp. 193-202
Author(s):  
William I. Hartkopf ◽  
Christine Allen ◽  
J.A. Davis ◽  
F.C. Fekel ◽  
P. Lampens ◽  
...  
Keyword(s):  
Double Star ◽  
Multiple Stars ◽  
Double And Multiple Stars

While Commission 26 remains one of the smallest in the IAU, it maintains an active program which belies its size, as highlighted below. Further information on the commission may be found at our website: http://ad.usno.navy.mil/wds/dsl.html\#iau. This site includes links to other sites and to major databases and catalogues, as well as bibliographies of recent double star papers, an archive of the Commission's Information Circulars, and a list of upcoming meetings.

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