The Gaia mission (original) (raw)

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Títol:	The Gaia mission
Autor:	Masana Fresno, Eduard Torra Roca, Jorge Balaguer Núñez, María de los Dolores Luri Carrascoso, Xavier Fabricius, Claus Castañeda Pons, Javier Bernardo Portell i de Mora, Jordi Torras Ambròs, Joan Carrasco Martínez, José Manuel Figueras Siñol, Francesca Fries, Aidan Gràcia Abril, G.Antiche Garzón, Erika Borrachero, Raúl Clotet Altarriba, Marcial Farras Casas, Martí Garralda Torre, Nora González Vidal, Juan José Gúrpide Lasheras, Andrés Julbe, Francesc Molina Martínez, Daniel Mor Crespo, Roger Romero Gómez, Mercè Soria Nieto, Sergio Voss, Hölger Weiler, Michael Anglada Escudé, Guillem Gallardo, E.Gebran, M.Isasi Parache, Y.Martínez Rubí, O.Palmer, Max Peralta, J.Valles, P.Gaia Collaboration
Matèria:	GalàxiesParal·laxiAstrometriaGalaxiesParallaxAstrometry
Data de publicació:	24-nov-2016
Publicat per:	EDP Sciences
Resum:	Gaia is a cornerstone mission in the science programme of the European Space Agency (ESA). The spacecraft construction was approved in 2006, following a study in which the original interferometric concept was changed to a direct-imaging approach. Both the spacecraft and the payload were built by European industry. The involvement of the scientific community focusses on data processing for which the international Gaia Data Processing and Analysis Consortium (DPAC) was selected in 2007. Gaia was launched on 19 December 2013 and arrived at its operating point, the second Lagrange point of the Sun-Earth-Moon system, a few weeks later. The commissioning of the spacecraft and payload was completed on 19 July 2014. The nominal five-year mission started with four weeks of special, ecliptic-pole scanning and subsequently transferred into full-sky scanning mode. We recall the scientific goals of Gaia and give a description of the as-built spacecraft that is currently (mid-2016) being operated to achieve these goals. We pay special attention to the payload module, the performance of which is closely related to the scientific performance of the mission. We provide a summary of the commissioning activities and findings, followed by a description of the routine operational mode. We summarise scientific performance estimates on the basis of in-orbit operations. Several intermediate Gaia data releases are planned and the data can be retrieved from the Gaia Archive, which is available through the Gaia home page.
Nota:	Reproducció del document publicat a: https://doi.org/10.1051/0004-6361/201629272
És part de:	Astronomy & Astrophysics, 2016, vol. 595
URI:	https://hdl.handle.net/2445/127856
Recurs relacionat:	https://doi.org/10.1051/0004-6361/201629272
ISSN:	0004-6361
Apareix en les col·leccions:	Articles publicats en revistes (Física Quàntica i Astrofísica)Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB))

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