Astronomical Applications of Astrometry: Ten Years of Exploitation of the Hipparcos Satellite Data
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The Hipparcos satellite, developed and launched by the European Space Agency (ESA) in 1989, was the first space mission dedicated to astrometry - the accurate measurement of positions, distances, and proper motions of stars. Amongst the key achievements of its measurements are refining the cosmic distance scale, characterizing the large-scale kinematic motions in the Solar neighborhood, providing precise luminosities for stellar modelling, and confirming Einstein's prediction of the effect of gravity on starlight. This authoritative account of the Hipparcos contributions over the last decade is an outstanding reference for astronomers, astrophysicists and cosmologists. It reviews the applications of the data in different areas, describing the subject and the state of the art before Hipparcos, and summarizing all major contributions to the topic made by Hipparcos. It contains a detailed overview of the Hipparcos and Tycho Catalogues, their annexes and their updates. Each chapter ends with comprehensive references to relevant literature.
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Solutions). Fabricius & Makarov (2000a) presented improved astrometry for a further 257 Hipparcos entries resolved into 342 components, of which 64 systems had no published astrometry. They used the Hipparcos Transit Data files combined with results from Tycho 2 to provide better initial values for the astrometric solution. Many of their systems have separations in the range critical for the Hipparcos instrument of 13–20 arcsec, and they still advocate using the derived separations with caution.
Scientific programme in 2000, and entered Phase B in 2006 with a target launch date at the end of 2011. The quoted references describe the astrometric capabilities, with further details given of the photometric capabilities by Jordi et al. (2006), and of the radial velocity measurement component by Katz et al. (2004) and Wilkinson et al. (2005). The mission targets the observation of all stars down to V ∼ 20 mag through on-board detection, reaching astrometric accuracies of ∼20 microarcsec at 15.
High proper motion stars and nearby stars (Hambly et al., 2004), white dwarfs (Hambly et al., 2005), and brown dwarfs (Scholz & Meusinger, 2002). The AAO/UKST SuperCOSMOS Hα survey (Parker et al., 2005) consists of 233 individual fields covering a swathe approximately 20◦ wide about the Southern Galactic Plane. Astrometric reduction also made use of the Hipparcos reference frame through the UCAC Catalogue, with the dense star grid allowing determination of the distortion maps on a film-by-film.
Fricke & Kopff (1963) Fricke et al. (1988) Fricke et al. (1991) Boss (1937) van Altena et al. (1995) Lasker et al. (1990) Cannon & Pickering (1918–49) Cannon (1925–36) Turon et al. (1992) ESA (1997) Corbin & Warren (1995) Luyten (1942) Luyten (1979) Giclas et al. (1959–78) Luyten (1963–87) L´epine & Shara (2005a) L´epine & Shara (2005b) Luyten (1957) Luyten (1980a,b) Hanson et al. (2004) Hanson et al. (2004) Yasuda et al. (1982) Morgan (1952) Høg & von der Heide (1976) R¨oser & Bastian (1991).
Methods. Traditionally, information on separations has been obtained from transit circles or astrographs, with systems studied visually using a micrometer on long-focus instruments to provide separations and position angles at the observation epoch. More recently, speckle interferometry has provided a wealth of data, with over 15 000 observations reported by the US Naval Observatory up to 2001. The Hipparcos results have provided many new insights into the statistical distribution of binaries,.