Hipparcos. Scientific aspects of the. space astrometry mission. esa sp-177. May Proceedings of an International Colloquium

Transcription

1 esa sp177 May 1982 Scientific aspects of the Hipparcos space astrometry mission Proceedings of an International Colloquium jointly organised by the European Space Agency, Copenhagen University Observatory & Observatoire de Strasbourg Strasbourg, 2223 February 1982 UB/TIB Hannover european space agency / agence spatiale européenne 810, rue MarioNikis, PARIS 15, France

2 Evolutions Ill CONTENTS vii Foreword E Htfg, C Jasohek & M A C Ferryman viii Hommage au Professeur Pierre Lacroute J delhaye 3 Histoire du projet d'astrométrie spatiale F Laoroute et perspectives Session 1: THE HIPPARCOS MISSION 15 The satellite Hipparcos J Kovalevsky 21 TYCHO A planned astrometric and photometric survey from space E Hfyj C Jasohek & L Lindegren 27 Proposed E H?!g ultraviolet observations with TYCHO 29 Le programme Hipparcos P Laoroute 31 Scientific organisation of the Hipparcos project MAC Ferryman Session 2: POSITIONS AND REFERENCE SYSTEMS 43 Determination of positions and the reference system W Frioke 49 On the importance of the Hipparcos stellar net for photographic catalogue work C de Vegt 53 The selection of stars for linking the Hipparcos frame to extragalactic radio sources by Space Telescope (progress report) A N Argue et al 57 Report by IAU Commission 24 Working Group on radio/optical astrometric sources for the establishment of an inertial reference frame A N Argue 61 Fiducial reference for the Hipparcos reference system F D Eemevway et al

3 IV 65 Radio stars as connecting link of the Hipparcos H G Walter and VLBI reference frames 69 US Naval Observatory parallaxes and the fundamental reference frame Their interaction with Hipparcos G Westerhout & J A Hughes 71 Geodetic applications of Hipparcos results E Groten Session 3: PROPER MOTIONS 77 Hipparcos proper motions R Wielen 83 Galactic structure results derived from studies of local kinematics K Lodên 85 The role of earlytype stars in studies of galactic dynamics S V M Clube 89 A comparision D BrLot of B and Be stars' kinematics 91 Advantages, implementation and cost estimate of a longlife version of the Hipparcos payload T SchmidtKaler Session 4: PARALLAXES AND THEIR ASTROPHYSICAL APPLICATIONS 97 Trigonometric parallaxes The stellar content of the volume of space covered by Hipparcos and some of its astrophysical implications A Blaauw 101 Absolute magnitudes and other basic parameters L Divan & J Zorea of 0 and B stars 105 Parallaxes for premain sequence Herbig Ae/Be stars F S Thé et al 107 Study of absolute magnitudes of B and Be stars D Briot & A M EubertDelplaoe 111 Astrophysical parameters for Ap and Am stars with Hipparcos M Gerbaldi et al 115 Trigonometric parallaxes from the ground and from Hipparcos C A Murray 121 Observation of selected nearby J Bergeat cool carbon stars

4 A V 123 The luminosity and related parameters of variable and nonvariable A, F stars E Antonello et al 125 Hipparcos and the determination of the helium content of some lowmass nonevolved halo and disk stars of the solar neighbourhood MN Ferrin Session 5: PHOTOMETRIC ASPECTS 133 Photometric aspects of TYCHO C Jasohek 137 Miratype variable stars and the impact of the Hipparcos mission M 0 Uennessier3 J Guibert & NguyenQRieu 139 Groundbased photometric data JC Mermilliod & M Mermilliod Session 6: DOUBLE AND MULTIPLESTAR SYSTEMS 147 Imaging properties of Hipparcos and the observation of multiple stars L Lindegren 155 Caractéristiques des étoiles doubles observables par Hipparcos P Bacchus 161 The interest of double star observations by Hipparcos J Dommanget 165 Absolute radii of single and multiple M Fracassini & L E Fasinetti stars from the CADARS 169 Search for binary asteroids with the ESA space astrometry satellite Hipparcos H J Sahober 173 Hipparcos could make the distance of the Hyades G Cayrel de Strobel into a conventional constant Session 7: MISCELLANEOUS ASPECTS 181 Relativistic effects in Hipparcos data B F Schutz 187 Concerning relativistic astometry S V M Clube 191 Inertial frame determination using minor planets proposal for Hipparcos observations S Sôderhjelm & L Lindegren 193 Detectable perturbations in the proper caused by Jupiterlike companions? W Gliese motions of the nearest stars

5 195 Interstellar reddening and distribution of B stars in the solar neighbourhood Impact of the Hipparcos/TYCHO mission J Guibert & D Egret 199 Calibration of the distance scale of planetary nebulae A Aoker 201 The intended scientific uses of the Hipparcos satellite by The Institute for Space Astrophysics, Frascati V Castellani Session 8: GROUNDBASED ACTIVITIES 207 Astrometric measurements required before Hipparcos launch I Requième 21 1 The new groundbased photometric measurements M Grenon 217 Radial velocity measurements complementary to Hipparcos M Mayor 221 Proposition de mesure de vitesses radiales stellaires pour le programme Hipparcos C Fehrenbaoh & M Duflot 224 Catalogue Hipparcos et observations au sol F Chollet & S Dêbarbat 231 Concluding remarks F Laoroute 233 Bibliography 235 Index 239 List of participants