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A dearth of dark matter in ordinary elliptical galaxies
Science (2003)
  • Aaron J. Romanowsky, San Jose State University
  • N. G. Douglas
  • M. Arnaboldi
  • K. Kuijken
  • M. R. Merrifield, University of Nottingham
  • N. R. Napolitano
  • M. Capaccioli

The kinematics of the outer parts of three intermediate-luminosity elliptical galaxies were studied with the Planetary Nebula Spectrograph. The galaxies' 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' halos. This unexpected result conflicts with findings in other galaxy types and poses a challenge to current galaxy formation theories.

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Publisher Statement
This is the author’s version of the work. It is posted here by permission of the AAAS for personal use, not for redistribution. The definitive version was published in Science on 301, 2003, DOI: 10.1126/science.1087441.
Citation Information
Aaron J. Romanowsky, N. G. Douglas, M. Arnaboldi, K. Kuijken, et al.. "A dearth of dark matter in ordinary elliptical galaxies" Science Vol. 301 Iss. 5640 (2003)
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