Release 11.12 ("Hergest Ridge")


Gclusters :: Bibliographic item "gc426"

Article ID: gc426
AuthorCuffey, James
TitleNGC 5053 and NGC 6838.
JournalAstrophysical Journal, vol. 98, p.49
Year of publication1943 (on gclusters from 2013-12-18 11:14:36 )
AbstractNGC 5053 and NGC 6838 are remarkable for their structural peculiarities; the former is a well-resolved globular cluster and the latter a highly condensed galactic cluster. A photometric survey, undertaken to compare these interesting objects, shows that their color-magnitude relations contain red giant branches, similar to those of typical globular clusters (...) The color-magnitude relation indicates that, in spite of its unusual structure, NGC 5053 is correctly classified as a globular cluster. In NGC 6838, also, the giant stars are red and become bluer with decreasing brightness. In this respect, as well in structure and richness in faint stars, NGC 6838 bears a striking resemblance to some of the globular clusters. The tendency of the color magnitude diagrams in the very rich galactic clusters (e.g, NGC 6838 and NGC 2158) to resemble the diagrams observed in the globular clusters emphasizes again the poorly defined boundaries between the two classes of objects (...) The distance derived, corrected for absorption, are: NGC 5053, 16,000 parsecs, and NGC 6838, 4,000 parsecs.
TagsNGC 5053 , NGC 6838

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