Wide Components in Double and Multiple Stars: Proceedings of the 97th Colloquium of the International Astronomical Union held in Brussels, Belgium, 8–13 June, 1987

Front Matter....Pages i-xiv
Front Matter....Pages 1-1
Welcome Address....Pages 3-3
General Introductory Lecture....Pages 5-8
Front Matter....Pages 9-9
The Concept of Star Multiplicity and its Historical Evolution....Pages 11-15
Wide Double Stars with Common Proper Motion....Pages 17-19
Wide Pairs in the Washington Double Star Catalogue (WDS)....Pages 21-21
The Contribution of the Hipparcos Mission and of the CCDM Catalogue to the Study of Wide Systems....Pages 23-30
A Photometric Catalogue of Visual and Multiple Stellar Systems....Pages 31-37
A General Catalogue of Ephemerides and Apparent Orbits for Visual Binaries....Pages 39-46
Front Matter....Pages 47-47
The Third Catalogue of Nearby Stars with Special Emphasis on Wide Binaries....Pages 49-56
The Search for Wide Pairs Among Nearby Stars....Pages 57-60
A Plea for Better Astrophysical and Astrometric Data in Case of Double Stars of Peculiar Interest....Pages 61-64
Front Matter....Pages 65-65
Distant Components in Double and Multiple Stars....Pages 67-78
Trapezium-Type Wide Systems....Pages 79-83
The Kinematics of Trapezium-Type Systems....Pages 85-88
A Survey of Third Components in Spectroscopic and Eclipsing Systems....Pages 89-95
Imaging Approach to Multiple Star Recognition: The Algorithm, the Results....Pages 97-97
Physical Parameters of the Massive Multiple System Eta Orionis....Pages 99-101
A Search and Classification of Multiple Systems in the General Field....Pages 103-108
Front Matter....Pages 109-109
Visual Binary Separations as Functions of Primary Types, Ages, and Locations....Pages 111-121
Photoelectric Observations of CPM Stars in the BVRI System....Pages 123-129
Front Matter....Pages 109-109
On the Wide Binaries in Selected Area 57....Pages 131-138
Studies of a Sample of CPM Stars....Pages 139-143
Wide Binaries and Old Disk Population Groups....Pages 145-151
Orbit Determination from a Short Arc through the Coefficients of Power Series in Time....Pages 153-160
Astrometric Parameters of Visual Double Stars Derived from Simulated Hipparcos Measurements....Pages 161-165
Front Matter....Pages 167-167
Tentative Comments about the Meeting....Pages 169-170
The Space Arrangement of the Orbital Planes of the Visual Double Stars....Pages 171-176
A Possible Connection between Wide Binaries and Open Clusters....Pages 177-179
New Orbits of Four Visual Double Stars by the Method of Apparent Motion Parameters (AMP)....Pages 181-183
Are Double Star Observations the Most Suspicious Ones in the Paris Astrolabe Programme ?....Pages 185-189
Visual Double Stars in Professional Spanish Astronomy: Past, Present and Future Projects....Pages 191-193
A Method for Calculating the Orbits of Interferometer/Spectroscopic Binaries from Combined Data....Pages 195-197
The Frequency of Wide Binaries among the Southern Barium Stars....Pages 199-201
Observation et Resolution du Systeme Triple η Virginis par la Methode des Occultations....Pages 203-206
The Researches at Torino on Wide Double Stars....Pages 207-210
Precise Radial Velocity Measurements of Visual Binary Stars....Pages 211-212
Mesures Photographiques D’Etoiles Doubles Visuelles Larges....Pages 213-214
Positions Precises D’etoiles Doubles Visuelles Larges....Pages 215-216
Software for Calculating Orbit and Mass of Visual Binaries....Pages 217-221
VRI Photometry of Late Dwarf Common Proper Motion Stars....Pages 223-225
Front Matter....Pages 167-167
CCD Suitable for Double Star Astrometry....Pages 227-230
Infrared Companions to Pre-Main Sequence Stars....Pages 231-231
Dynamical Evolution of Triple Systems (Scientific film)....Pages 233-233
Front Matter....Pages 235-235
Statistical Studies on Wide Pairs....Pages 237-244
Statistical Study of Visual Binaries....Pages 245-254
The Optical Fraction of a Hipparcos Sample of Wide Binaries....Pages 255-258
Wide Binaries in a Hipparcos Sample Centered Around b = 0°, l = 300°....Pages 259-264
Front Matter....Pages 265-265
Theoretical Models for Wide Binary Evolution....Pages 267-276
How we can Learn from Studies of Wide Binary Statistics....Pages 277-287
Evidence for Mass Loss in Visual Binary Stars....Pages 289-304
Concluding Remarks....Pages 305-310
Erratum....Pages 311-311