The spatial structure of the globular cluster NGC 6535

Details The spatial structure of the globular cluster NGC 6535 The spatial structure of the globular cluster NGC 6535

Apr 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988azh....65..317p&link_type=abstract

Astronomicheskii Zhurnal (ISSN 0004-6299), vol. 65, Mar.-Apr. 1988, p. 317-329. In Russian.

Astronomy and Astrophysics

Astronomy

5

Astronomical Photography, Globular Clusters, Spatial Distribution, Star Distribution, Distribution Functions, Photographic Plates, Stellar Magnitude

Scientific paper

The spatial structure of the globular cluster NGC 6535 is studied as a function of different star magnitude intervals (Delta B) and different limiting star magnitudes (B) up to which the star counts are carried out. Astrometric and photometric measurements of the plate obtained on the 2-m reflector in Rozhen, Bulgaria are used. Analysis of the differential and integral visible and spatial star density functions in the intervals of 10-16 m, 16-18 m, 16-19 m, 19-20 m, 20-21 m, and 21-21.5 m and down to the limiting magnitudes of 16, 18, 19, 20, 21, and 21.5 shows that the radii of the spatial zones in the cluster increase systematically according to the same law; they increase with an increase in B below the transition region between the subgiant branch and the main-sequence turn-off point.

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