Astronomy and Astrophysics – Astrophysics
Scientific paper
1996-09-09
Astronomy and Astrophysics
Astrophysics
14 pages, 3 figures, latex, uses conf_iap.sty, invited talk at the 12th IAP Colloquium: Variable stars and the astrophysical r
Scientific paper
This is a personal review of various issues related to massive photometric and astrometric searches. A complete inventory of variable stars down to almost any magnitude limit will improve our understanding of the stellar evolution and the galactic structure. A search for detached eclipsing binaries will improve the distance scale, the value of the Hubble constant, and the age of the oldest stars. A search for supernovae will help the determination of cosmological parameters Omega and Lambda. A search for microlensing events will provide insight into the stellar mass function, dark matter, and may lead to a discovery of earth-mass planets.
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