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- W2339475497 abstract "The GAIA Galactic survey satellite will obtain photometry in 15 filters of over 109 stars in our Galaxy across a very wide range of stellar types. No other planned survey will provide so much photometric information on so many stars . I examine the problem of how to determine fundamental physical parameters (7~ff, log g , (Fe/H) etc .) from these data . Given the size, multidimensionality and diversity of this dataset, this is a challenging task beyond any encountered so far in large-scale stellar parametrization . I describe the problems faced (initial object identification, interstellar extinction, multiplicity, missing data etc .) and present a framework in which they can be addressed. A probabil istic approach is advocated on the grounds that it can take advantage of additional information (e.g. priors and data uncertainties) in a consistent and useful manner, as well as give meaningful results in the presence of poor or degenerate data. Furthermore, I suggest an approach to parametrization which can use the other information GAIA will acquire, in particular the parallax , which has not previously been available for large-scale multidimensional parametrization. Several of the problems identified and ideas suggested will be relevant to other large surveys, such as SDSS , DIVA, FAME, VISTA and LSST, as well as stellar parametrization in a virtual obse rvatory." @default.
- W2339475497 created "2016-06-24" @default.
- W2339475497 creator A5065233943 @default.
- W2339475497 date "2002-01-01" @default.
- W2339475497 modified "2023-09-27" @default.
- W2339475497 title "DETERMINATION OF STELLAR PARAMETERS WITH GAIA" @default.
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