Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...333..594e&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 333, Oct. 15, 1988, p. 594-610. Research supported by Corning Glass Works F
Astronomy and Astrophysics
Astrophysics
57
Astronomical Photometry, Galactic Structure, Globular Clusters, Interstellar Extinction, Stellar Color, Ubv Spectra, Galactic Evolution, Galactic Mass, Spatial Distribution, Stellar Luminosity
Scientific paper
The authors have reexamined all published data on globular cluster candidates in M31 in order to isolate a large sample of clusters with reliable UBV photometry and independent reddening estimates. The distribution of the intrinsic colors of the M31 clusters is indistinguishable from that of the Galactic globulars. The authors use the intrinsic colors of the clusters to construct three different metallicity groups, whose spatial distributions and kinematics are explored. Both the flattening and kinematics of the system of metal-rich clusters are suggestive of a disk, while the more metal-poor clusters show little evidence for rotation. The flattening of the system of metal-poor and intermediate clusters is similar to that of the spheroid of M31. The effective radius of the intermediate system is also similar to that of the spheroid, while the metal-poor cluster system is significantly more extended.
Elson Rebecca A.
Walterbos Rene A. M.
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