Confirmation of the Galactic thick disk component by the Basle RGU- UBV-photometric space densities. II

Details Confirmation of the Galactic thick disk component by the Basle RGU- UBV-photometric space densities. II Confirmation of the Galactic thick disk component by the Basle RGU- UBV-photometric space densities. II

Jul 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26as...79...51f&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 79, no. 1, July 1989, p. 51-60. Research supported by SNSF.

Astronomy and Astrophysics

Astrophysics

20

Astronomical Photometry, Density Distribution, Galactic Structure, Space Density, Stellar Luminosity, Stellar Models, Galactic Nuclei, Ultraviolet Photometry, Visual Photometry

Scientific paper

Data from the Basle Halo Program are analyzed in order to compare the three-color photometrically determined space densities for different luminosity groups of the combined (photometric) populations I and II with the gradients predicted for the involved direction by a representative set of current standard multicomponent models for the stellar space distribution in the Galaxy. The method of Fenkart (1989) is used to homogeneously treat fields in the directions of Plaut I, NNC 6171, SA 158, and M13. The findings do not rule out the existence of a Galactic thick disk component, and the results for the directions of Plaut I and M13 support the theory. It is found that the closer a field direction comes to the direction of the galactic nucleus, the less appropriate the current standard model definitions will be to describe the complicated stellar distribution situation there.

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