ESA Science & Technology - Publication Archive
Archive intro text - publications
A special issue of Astronomy & Astrophysics on the Gaia data release 1 was published in November 2016. Links to the papers in that issue can be found here.
A special issue of Astronomy & Astrophysics on the Gaia data release 2 was published in April 2018. Links to the papers in that issue can be found here.
Below is a selection of publications related to the Gaia mission.
Aims. Our aim is to investigate how early Gaia data can be optimally combined with information from the Hipparcos Catalogue in order to provide the most accurate and reliable results for HTPM.
Methods. The Astrometric Global Iterative Solution (AGIS) was developed to compute the astrometric core solution based on the Gaia observations and will be used for all releases of astrometric data from Gaia. We adapt AGIS to process Hipparcos data in addition to Gaia observations, and use simulations to verify and study the joint solution method.
Results. For the HTPM stars we predict proper motion accuracies between 14 and 134 μas yr-1, depending on stellar magnitude and amount of Gaia data available. Perspective effects will be important for a significant number of HTPM stars, and in order to treat these effects accurately we introduce a formalism called scaled model of kinematics (SMOK). We define a goodness-of-fit statistic which is sensitive to deviations from uniform space motion, caused for example by binaries with periods of 10–50 years.
Conclusions. HTPM will significantly improve the proper motions of the Hipparcos Catalogue well before highly accurate Gaia-only results become available.
[Remainder of abstract truncated due to character limitations]
Cataloguing the night sky is an essential part of astronomy. Before astronomers can investigate a celestial object, they must know where to find it. Without this knowledge, astronomers would wander helplessly in what Galileo once termed a 'dark labyrinth'.
ESA's Gaia mission will create a detailed map of this labyrinth, finding clues to the origin, structure and evolution of our home galaxy, the Milky Way.
- The discovery machine
- Stars as individuals and collectives
- Our Solar System and others
- How does Gaia work?
- Building Gaia
- The flood of data
Editors: Vladas Vansevicius, Arunas Kucinskas, Jokubas Sudzius
The proceedings are published in Astrophysics and Space Science Vol. 280, Issue 1-2, 2002 (see contents list online - restricted access) and are available online
9-12 September 2002
La Residenza del Sole
Gressoney St. Jean
Editors: Olivier Bienaymé and Catherine Turon
The proceedings are published in the EAS Publications Series, Volume 2 (2002) and are available online.