Census of the Galaxy: Challenges for Photometry and Spectrometry with GAIA (eBook)

Proceedings of the Workshop held in Vilnius, Lithuania 2-6 July 2001

Arunas Kucinskas, Jokubas Sudzius, Vladas Vansevicius (Herausgeber)

eBook Download: PDF

2012
Springer Netherlands (Verlag)
978-94-010-0361-2 (ISBN)

Infos

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.

Produkt-Details

• Erscheint lt. Verlag: 6.12.2012
• Sprache: englisch
• Themenwelt: Naturwissenschaften ► Physik / Astronomie ► Astronomie / Astrophysik
• ISBN-10: 94-010-0361-0 / 9401003610
• ISBN-13: 978-94-010-0361-2 / 9789401003612