RGU-three colour photometry in the anticentre-intermediate latitude field NGC 2420

Details RGU-three colour photometry in the anticentre-intermediate latitude field NGC 2420 RGU-three colour photometry in the anticentre-intermediate latitude field NGC 2420

Jan 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26as...67..245f&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 67, no. 2, Jan. 1987, p. 245-260. SNSF-supported research.

Astronomy and Astrophysics

Astrophysics

18

Galactic Structure, Giant Stars, Late Stars, Space Density, Star Distribution, Stellar Spectrophotometry, Density Distribution, Galactic Nuclei, Main Sequence Stars, Stellar Magnitude

Scientific paper

A starfield in anticentre-direction (l = 198°, b = +20°) has been investigated within the frame of the Basle Halo Program, adopting the RGU-three colour photometric method for the separation of the (photometric) disk- and halo-populations and for the determination of their (logarithmic) space densities. This method has been developed by Becker (1965) and first applied to a starfield in SA 51. The comparison between the results of these anticentre investigations and its consequence for the isodensity pattern in the named quarter of the meridian are discussed. The authors give the observational data, show the two-colour diagrams (TCD) for consecutive intervals in apparent magnitude G down to Glim = 18m and discuss the overall-, as well as the 1m-absolute magnitude interval-density functions of the three-colour photometrically separable star-types as evaluated from the TCDs, respectively.

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