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Title:
Is there nonluminous matter in dwarf spheroidal galaxies
Authors:
Faber, S. M.; Lin, D. N. C.
Affiliation:
AA(Lick Observatory; California, University, Santa Cruz, CA), AB(Lick Observatory; California, University, Santa Cruz, CA)
Publication:
Astrophysical Journal, Part 2 - Letters to the Editor, vol. 266, Mar. 1, 1983, p. L17-L20. (ApJ Homepage)
Publication Date:
03/1983
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
COSMOLOGY, DWARF GALAXIES, GALACTIC EVOLUTION, GALACTIC STRUCTURE, MASS TO LIGHT RATIOS, LUMINOSITY, SPHEROIDS
DOI:
10.1086/183970
Bibliographic Code:
1983ApJ...266L..17F

Abstract

Evidence from tidal masses indicates that mass-to-light ratios of dwarf spheroidal galaxies are roughly one order of magnitude larger than those of globular clusters. The authors tentatively infer that dwarf spheroidal galaxies contain large amounts of nonluminous matter and in this regard resemble bigger galaxies. The luminosity profiles of dwarf spheroidal galaxies are also shown to be consistent with exponential laws, possibly indicating a closer evolutionary link to spiral-irregular galaxies than to elliptical galaxies.

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