Photometry of stars in the central region of the globular cluster M13

Details Photometry of stars in the central region of the globular cluster M13 Photometry of stars in the central region of the globular cluster M13

Feb 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988pazh...14..151k&link_type=abstract

Pis'ma v Astronomicheskii Zhurnal (ISSN 0320-0108), vol. 14, Feb. 1988, p. 151-155. In Russian. In Russian. In Russian.

Other

Astronomical Photography, Globular Clusters, Red Giant Stars, Stellar Spectrophotometry, Color-Magnitude Diagram, Horizontal Branch Stars, Star Distribution, Stellar Luminosity

Scientific paper

Photographic BV-photometry has been carried out for about 180 stars in the central region (r ≤ 1arcmin.3) of M13. Two methods were used to take into account background influence: Weaver's formula and the method of the background compensation by wedge. The second of these methods proves to be the better one. Obtained color-magnitude diagram and luminosity function for the red giant branch have been compared with data of other authors. As a result some particularities of star distribution on the red giant branch and horizontal branch are found. The question concerning the quantity of UV-bright stars in M13 is discussed.

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