IAU IAU Symposium Proceedings of the International Astronomical Union IAU Symposium No. 330 Symposium 24–28 April 2017 Astrometry has historically been fundamental to all the fi elds of astronomy, driving many revolutionary scientifi c results. ESA’s Gaia 330 Nice, France mission is astrometrically, photometrically and spectroscopically surveying the full sky, measuring around a billion stars to magnitude 20, to allow stellar distance and age estimations with unprecedented accuracy. With the complement of radial 24–28 April 2017 330 Astrometry and 24–28 April 2017 velocities, it will provide the full kinematic information of these Nice, France targets, while the photometric and spectroscopic data will be used Nice, France Astrometry and Astrophysics in the to classify objects and astrophysically characterize stars. IAU Symposium 330 reviews the fi rst 2.5 years of Gaia activities and Gaia Sky discusses the scientifi c results derived from the fi rst Gaia data Astrophysics in the release (GDR1). This signifi cant increase in the precision of the astrometric measurements has sharpened our view of the Milky Way and the physical processes involved in stellar and galactic evolution. To many, the Gaia revolution heralds a transformation Gaia Sky comparable to the impact of the telescope’s invention four centuries ago. Proceedings of the International Astronomical Union Editor in Chief: Dr Piero Benvenuti This series contains the proceedings of major scientifi c meetings held by the International Astronomical Union. Each volume contains a series of articles on a topic of current interest in Astrometry and astronomy, giving a timely overview of research in the fi eld. With contributions by leading scientists, these books are at a level Astrophysics suitable for research astronomers and graduate students. in the Gaia Sky Edited by Recio-Blanco Alejandra Recio-Blanco de Laverny Brown Patrick de Laverny Prusti Anthony G. A. Brown Timo Prusti ISSN 1743-9213 International Astronomical Union Proceedings of the International Astronomical Union International Astronomical Union Proceedings of the International Astronomical Union Cambridge Core For further information about this journal please go to the journal website at: cambridge.org/iau Downloaded from https://www.cambridge.org/core. IP address: 170.106.202.126, on 29 Sep 2021 at 06:35:39, subject to the Cambridge Core terms of use, available at https://www.cambridge.org/core/terms. https://doi.org/10.1017/S1743921317009723 ASTROMETRY AND ASTROPHYSICS IN THE GAIA SKY IAU SYMPOSIUM 330 COVER ILLUSTRATION: Picture adapted from the Symposium poster (credits : A. Titarenko and Service Communication OCA): photomontage showing the Promenade des Anglais and the Mediterranean sea in Nice. It includes a drawing of the Gaia satellite and of the Grande Coupole of the Observatoire de la Cˆote d’Azur historical site (built by Gustave Eiffel and Charles Garnier). Downloaded from https://www.cambridge.org/core. IP address: 170.106.202.126, on 29 Sep 2021 at 06:35:39, subject to the Cambridge Core terms of use, available at https://www.cambridge.org/core/terms. https://doi.org/10.1017/S1743921317009723 IAU SYMPOSIUM PROCEEDINGS SERIES Chief Editor PIERO BENVENUTI, IAU General Secretary IAU-UAI Secretariat 98-bis Blvd Arago F-75014 Paris France [email protected] Editor MARIA TERESA LAGO, IAU Assistant General Secretary Universidade do Porto Centro de Astrof´ısica Rua das Estrelas 4150-762 Porto Portugal [email protected] Downloaded from https://www.cambridge.org/core. IP address: 170.106.202.126, on 29 Sep 2021 at 06:35:39, subject to the Cambridge Core terms of use, available at https://www.cambridge.org/core/terms. https://doi.org/10.1017/S1743921317009723 INTERNATIONAL ASTRONOMICAL UNION UNION ASTRONOMIQUE INTERNATIONALE International Astronomical Union U U ASTROMETRY AND ASTROHPYSICS IN THE GAIA SKY PROCEEDINGS OF THE 330th SYMPOSIUM OF THE INTERNATIONAL ASTRONOMICAL UNION HELD IN NICE, FRANCE APRIL 24–28, 2017 Edited by ALEJANDRA RECIO-BLANCO Universit´eCˆote d’Azur, Observatoire de la Cˆote d’Azur, CNRS, Laboratoire Lagrange, France PATRICK DE LAVERNY Universit´eCˆote d’Azur, Observatoire de la Cˆote d’Azur, CNRS, Laboratoire Lagrange, France ANTHONY G.A. BROWN Leiden Observatory, Leiden University, Leiden, The Netherlands and TIMO PRUSTI ESA/ESTEC Downloaded from https://www.cambridge.org/core. IP address: 170.106.202.126, on 29 Sep 2021 at 06:35:39, subject to the Cambridge Core terms of use, available at https://www.cambridge.org/core/terms. https://doi.org/10.1017/S1743921317009723 cambridge university press University Printing House, Cambridge CB2 8BS, United Kingdom 1 Liberty Plaza, Floor 20, New York, NY 10006, USA 10 Stamford Road, Oakleigh, Melbourne 3166, Australia c International Astronomical Union 2018 This book is in copyright. Subject to statutory exception and to the provisions of relevant collective licensing agreements, no reproduction of any part may take place without the written permission of the International Astronomical Union. First published 2018 Printed in the UK by Bell & Bain, Glasgow, UK Typeset in System LATEX2ε A catalogue record for this book is available from the British Library Library of Congress Cataloguing in Publication data This journal issue has been printed on FSCTM-certified paper and cover board. FSC is an independent, non-governmental, not-for-profit organization established to promote the responsible management of the world’s forests. Please see www.fsc.org for information. ISBN 9781107170087 hardback ISSN 1743-9213 Downloaded from https://www.cambridge.org/core. IP address: 170.106.202.126, on 29 Sep 2021 at 06:35:39, subject to the Cambridge Core terms of use, available at https://www.cambridge.org/core/terms. https://doi.org/10.1017/S1743921317009723 v TableofContents Preface............................................................ xiv Conference Photograph . ............................................. xv Dedication of the Symposium . ........................................ xvi The Organizing Committee . ........................................ xviii Participants........................................................ xx Tribute to Fran¸coisMignard’sresearch.................................. 1 J. Kovalevsky The Gaia Sky The Gaia mission status . ............................................. 7 T. Prusti TheGaiasky:version1.0............................................. 13 A. G. A. Brown Gaia: fromproposaltoGDR1.......................................... 23 G. Gilmore Gaia Photometric Data: DR1 results and DR2 expectations ................. 30 D. W. Evans, M. Riello, F. De Angeli, G. Busso, F. van Leeuwen, L. Eyer, C. Jordi, C. Fabricius, J. M. Carrasco, M. Weiler, P. Montegriffo, C. Cacciari & E. Pancino TheGaiaArchive.................................................... 35 A. Mora, J. Gonz´alez-N´u˜nez,D.Baines,J.Dur´an, R. Guti´errez-Sanch´ez, E. Racero, J. Salgado & J. C. Segovia Astrometry and Fundamental Physics The Tycho-Gaia Astrometric Solution ................................... 41 L. Lindegren AstrometricsurveysintheGaiaera..................................... 49 N. Zacharias Multiply imaged quasars in the Gaia DR1. ............................... 59 C. Ducourant, L. Delchambre, F. Finet, L. Galluccio, A. Krone-Martins, J. F. Le Campion, F. Mignard, E. Slezak, J. Surdej, R. Teixeira & O. Wertz Local tests of gravitation with Gaia observations of Solar System Objects . .... 63 A. Hees, C. Le Poncin-Lafitte, D. Hestroffer & P. David GaiaNIR – A future all-sky astrometry mission ........................... 67 D. Hobbs & E. Høg Downloaded from https://www.cambridge.org/core. IP address: 170.106.202.126, on 29 Sep 2021 at 06:35:39, subject to the Cambridge Core terms of use, available at https://www.cambridge.org/core/terms. https://doi.org/10.1017/S1743921317009723 vi Contents Gaia DR1 compared to VLBI positions . ............................... 71 F. Mignard & S. Klioner The LQAC-4, last update of the Large Quasar Astrometric Catalogue ........ 75 J. Souchay, A. H. Andrei, C. Barache, F. Taris, C. Gattano & B. Coelho The Differential Astrometric Reference Frame on short timescales in the Gaia Era 79 U. Abbas, B. Bucciarelli, M. G. Lattanzi, M. Crosta, M. Gai, R. Smart, A. Sozzetti & A. Vecchiato The PMA Catalogue as a realization of the extragalactic reference system in optical andnearinfraredwavelengths...................................... 81 V. S. Akhmetov, P. N. Fedorov & A. B. Velichko New Astronomical Reduction of Old Observations (the NAROO project) . .... 83 J.-E. Arlot, V. Robert, V. Lainey, C. Neiner & N. Thouvenin Using Gaia as an Astrometric Tool for Deep Ground-based Surveys. ......... 85 D. I. Casetti-Dinescu, T. M. Girard & M. Schriefer Remarks of Gaia DR1 magnitude using ground-based optical monitoring of QSOs 88 G. Damljanovi´c, F. Taris & A. Andrei Outline of Infrared Space Astrometry missions:JASMINE . .................. 90 N. Gouda & JASMINE working group GIER: A Danish computer from 1961 with a role in the modern revolution of astronomy-II .................................................. 92 E. Høg Astrometry with A-Track Using Gaia DR1 Catalogue ...................... 94 Y. Kılı¸c, O. Erece & M. Kaplan Astrometry for New Reductions: The ANR method . ...................... 96 V. Robert & C. Le Poncin-Lafitte Optimisation of JWST operations with the help of Gaia . .................. 98 J. Sahlmann, E. G. Nelan, P. Chayer, B. McLean & M. Lallo Kinematics of our Galaxy from the PMA and TGAS catalogues. ............. 100