Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981stin...8221115b&link_type=abstract
Linear diameters and distances of open clusters Transl. into ENGLISH from Astron. Tsirk. (USSR), no. 995, 1978 p 4-7
Astronomy and Astrophysics
Astronomy
Angular Distribution, Line Spectra, Open Clusters, Star Distribution, Stellar Evolution, Stellar Spectra, Absorptivity, Hubble Diagram, Least Squares Method, Spectral Correlation
Scientific paper
The spatial distribution of open star clusters was studied. A growth of the linear diameters with increasing cluster distance from the Sun was observed. Possible causes of the revealed dependence include the influence of a selection effect when massive stellar aggregates are observed at greater distances, systematic errors in the measurements of angular diameters of the clusters, and the effect of evolution on the construction of the zero age main sequence. Considering the effect of each of the factors enumerated, boundary conditions were introduced and the dependence was examined separately for clusters of various ages. The values of the coefficients of the slope of the lines were determined and the reliability of the result was obtained depending on Stefan's constant in the solution of the systems of conditional equations by the least square method, formed for the clusters as a whole and for various age groups of the clusters.
Barkhatova K. A.
Pylskaja O. P.
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