Density gradients for disc- and halo-stars in the direction of the globular cluster NGC 7006

Details Density gradients for disc- and halo-stars in the direction of the globular cluster NGC 7006 Density gradients for disc- and halo-stars in the direction of the globular cluster NGC 7006

May 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26as...52..269b&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 52, May 1983, p. 269-277. Research supported by the Swiss Na

Astronomy and Astrophysics

Astrophysics

3

Galactic Structure, Giant Stars, Globular Clusters, Stellar Color, Stellar Spectrophotometry, Late Stars, Main Sequence Stars, Stellar Luminosity, Stellar Magnitude

Scientific paper

A photographic RGU-photometry of 1810 stars down to the limiting magnitude G = 19 m has been carried out in a field of 0.29 sq deg near the globular cluster NGC 7006 (l = 64 deg, b = -19 deg). The possibilities of identifying main-sequence stars and late-type giants of both populations by means of the two-color diagrams are discussed. No interstellar absorption could be detected in this direction. Density functions have been determined for main-sequence stars and late-type giants of population I and for main-sequence stars of population II. The population I functions are compared with the ones valid for the solar neighborhood reduced to the galactic latitude of the field studied D(z/sin b). The luminosity function for main-sequence stars of population I witin 400 to 800 pc has been determined and compared to the ones valid for the solar neighborhood and for z = 200 pc. Finally, the color-magnitude diagrams of both populations are discussed.

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