A dearth of dark matter in ordinary elliptical galaxies
- Romanowsky, Aaron J.
- Douglas, N. G.
- Arnaboldi, M.
- Kuijken, K.
- Merrifield, M. R.
- Napolitano, N. R.
- Capaccioli, M.
Publication date
January 2003
DOI Publisher
American Association for the Advancement of Science (AAAS) ISSN
0036-8075 Language
English Citation count (estimate)
251Abstract
The kinematics of the outer parts of three intermediate-luminosity elliptical galaxies were studied with the Planetary Nebula Spectrograph. The galaxies\u27 velocity-dispersion profiles were found to decline with the radius, and dynamical modeling of the data indicates the presence of little if any dark matter in these galaxies\u27 halos. This unexpected result conflicts with findings in other galaxy types and poses a challenge to current galaxy formation theories
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