The Basel high-latitude survey of the Galaxy. I - Star count analysis from galaxy models

Details The Basel high-latitude survey of the Galaxy. I - Star count analysis from galaxy models The Basel high-latitude survey of the Galaxy. I - Star count analysis from galaxy models

Apr 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...145....1b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 145, no. 1, April 1985, p. 1-18. Research supported by the Swiss National Scie

Astronomy and Astrophysics

Astrophysics

38

Astronomical Photometry, Galactic Structure, Milky Way Galaxy, Population Theory, Star Distribution, Stellar Luminosity, Color-Magnitude Diagram, Disk Galaxies, Halos, Least Squares Method

Scientific paper

Least squares calculations are performed to investigate the best fitting models and to place constraints on parameter values, in the present analysis of star count data in 15 fields of the Basel Palomar-Schmidt-based high latitude survey employing a large number of parameterized two-component models of the Galaxy, where these consist of an exponential disk and an oblate spheroid halo. This approach interprets the data in terms of luminosity functions for kinematically distinct disk and halo populations, thereby avoiding the difficulties involved in earlier analyses of the same data. In addition, improved transformations have been used in the conversion of the computed star counts from UBV to the photographic RGU system, taking into account previously unrecognized color equations existing in the Basel data. The best models reproduce observations to an accuracy of better than about 15 percent for most fields.

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