Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26as...51..135a&link_type=abstract
Astronomy and Astrophysics Supplement Series, vol. 51, Jan. 1983, p. 135-142.
Astronomy and Astrophysics
Astrophysics
10
Astrometry, Color-Magnitude Diagram, Globular Clusters, Star Distribution, Stellar Color, Stellar Magnitude, Visual Photometry, Astronomical Catalogs, Blue Stars, Brightness Distribution, Error Analysis, Horizontal Branch Stars, Radial Distribution, Red Giant Stars, Ubv Spectra
Scientific paper
As a part of an investigation of the central regions of concentrated globular clusters, we present relative positions, B and V magnitudes, for 657 stars in a 1' x 1' square field centred on NGC 7089 (M 2). We plot a color- magnitude diagram for these stars that we compare to the color-magnitude diagrams obtained by Arp (1955) and Harris (1975) for the external part of the cluster. Then, we plot the radial variations of B and V brightnesses, (B-V) color, projected densities of red giants and blue horizontal branch stars for the concerned field.
Auriere Michel
Cordoni Jean-Pierre
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