Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980srst.coll..151v&link_type=abstract
In NASA. Marshall Space Flight Center Sci. Res. with the Space Telescope p 151-164 (SEE N80-22130 12-88)
Astronomy and Astrophysics
Astrophysics
6
Galactic Clusters, Hubble Space Telescope, Star Distribution, Astrophysics, Celestial Mechanics, Galactic Evolution, Stellar Luminosity
Scientific paper
A disc and halo population model is constructed to fit star counts and color data down to V approximately 23 at absolute value of b = 90 deg. This model is used to predict star counts and colors down to V approximately 30. Deviations from these extrapolated relationships provide constraints on the number of faint quasars and black dwarf stars. It is shown that extra-galactic globular clusters start contributing significantly to star counts at V approximately 25 and are more numerous than stars for V 31. Morphological studies of galaxies with approximately 0.5, were made with the space telescope. Significant constraints on theoretical models that describe the evolution of clusters of galaxies are provided.
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