Census of the galaxy : challenges for photometry and spectrometry with GAIA : Proceedings of the Workshop held in Vilnius, Lithuania 2-6 July 2001

Astrometry from space was performed for the first time and with great success by the ESA Hipparcos satellite (1989-93). This mission was designed as an as­ trometry mission, but the use of a photon counting detector made it possible to produce very important photometric results: the most accurate astronomical pho­ tometry ever by the main Hipparcos mission in a very broad band of 120000 stars, and the two-colour Tycho-2 photometry of 2.5 million stars. The cornerstone ESA mission GAIA was approved in October 2000 for launch not later than 2012. This mission will use CCDs in time-delayed integration mode instead of the photo-cathode detectors used in Hipparcos. Due to the higher quantum efficiency of the CCDs, simultaneous integration of many stars, and larger tele­ scope apertures GAIA will utilize the star light a million times more efficiently than Hipparcos, resulting in astrometry and multi-colour photometry for one billion stars. GAIA photometry is crucial for the scientific utilization of the astrometric results, and the photometric data have a high scientific content in themselves. Front Matter....Pages i-ix GAIA: An Astrometric and Photometric Survey of our Galaxy....Pages 1-10 Front Matter....Pages 11-11 GAIA Photometry: Selected Topics....Pages 13-19 Determination of Stellar Parameters with GAIA....Pages 21-29 GAIA Photometric System: Evaluation of Performance....Pages 31-39 GAIA Photometric System: Simultaneous 4-D Parameterization....Pages 41-46 GAIA Photometric System: Simulation of Photometric Observations....Pages 47-50 The Spectro Point Spread Function for GAIA....Pages 51-56 On the Tolerances of Filters for GAIA Medium Band Photometric System....Pages 57-62 Bandwidth Effects in the 3G Photometric System....Pages 63-66 Transformations between Vilnius and Strömgren Photometric Systems....Pages 67-70 Systematic Errors of High-Precision Photometric Catalogues....Pages 71-76 The Asiago Database on Photometric Systems (ADPS) and the Design of the GAIA Photometric System....Pages 77-82 Basel: A Library of Synthetic Spectra and Colours for GAIA....Pages 83-87 Japanese Astrometry Satellite Mission for Infrared Exploration....Pages 89-94 Front Matter....Pages 95-95 Methods to Account for Interstellar Extinction....Pages 97-107 3-D Structure of the Galactic Interstellar Matter: A Contribution from GAIA....Pages 109-114 A Synthetic Map of the Galactic Interstellar Extinction....Pages 115-118 Diffuse Interstellar Band at 862 nm as a Reddening Tracer for GAIA....Pages 119-124 GAIA and Population II Visual Binaries....Pages 125-128 Unresolved Binaries and the Initial Mass Function....Pages 129-132 Front Matter....Pages 95-95 Binary Star Detection with the GAIA Radial Velocity Spectrometer....Pages 133-137 Detection of Extra-Solar Planets by GAIA Photometry....Pages 139-142 α -Process Elements in the Galaxy: A Possible GAIA Contribution....Pages 143-150 Asymptotic Giant Branch Stars as Tracers of Star Formation Histories: The GAIA Context....Pages 151-157 Globular Clusters in the Large Magellanic Cloud: An Impact from GAIA Photometry....Pages 159-163 GAIA and the Extragalactic Distance Scale....Pages 165-182 Front Matter....Pages 183-183 Ground Based Testing of the GAIA Filters....Pages 185-189 General Discussion and Photometric System for GAIA....Pages 191-194 The book contains the highlights from the first full-scale Meeting of the GAIA Photometry Working Group. It brings up-to-date information on the current status in the development of the ESA's astrometric space mission GAIA, emphasizing on the design and optimization of the GAIA's photometric instrument. Also covered are selected topics dealing with the strategies for the evaluation of the photometric systems, photometric classification procedure, the application of the photometric systems for studying Galactic structure and evolution with GAIA. The book will be especially interesting for researchers involved in the astronomical photometry, as well as for a more general audience interested in the astrophysical applications of the space astrometry and photometry.