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Title:
The small-scale clustering properties of dwarf galaxies
Authors:
Vader, J. P.; Sandage, Allan
Affiliation:
AA(Yale University, New Haven, CT), AB(Observatoires of the Carnegie Institution of Washington, Pasadena, CA)
Publication:
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 379, Sept. 20, 1991, p. L1-L5. Research supported by Yale University and NASA. (ApJL Homepage)
Publication Date:
09/1991
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Dwarf Galaxies, Galactic Clusters, Galactic Evolution, Astronomical Photography, Galactic Structure, Halos, Photographic Plates
DOI:
10.1086/186140
Bibliographic Code:
1991ApJ...379L...1V

Abstract

Two results on the small-scale clustering properties of dwarf galaxies are reported, which were identified in the vicinity of early-type Shapley-Ames galaxies on high-resolution photographic plates. The first result indicates that dwarf galaxies display the same trend of stronger clustering toward earlier morphological type on small scales as their giant counterparts on larger scales. It is suggested that early-type dwarfs can be used as dynamical probes of dark halos around early-type giant galaxies and as tracers of the dynamical evolution of such halos in dense environments. The second result pertains to the trend of increasing early-type dwarf frequency per early-type giant with environment richness previously established for rich groups. It is found that a minimum value of isolated early-type galaxies is approximately 0.25, as compared to a maximum of approximately 8 in rich environments like the Virgo Cluster.

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