A dearth of dark matter in ordinary elliptical galaxies

A. J. Romanowsky*, N. G. Douglas, M. Arnaboldi, K. Kuijken, M. R. Merrifield, N. R. Napolitano, M. Capaccioli, K. C. Freeman

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

324 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)1696-1698
Number of pages3
JournalScience
Volume301
Issue number5640
DOIs
Publication statusPublished - 19-Sep-2003

Keywords

  • PLANETARY-NEBULAE
  • RADIAL-VELOCITIES
  • NGC-3379
  • HALO
  • PHOTOMETRY
  • DISTRIBUTIONS
  • KINEMATICS
  • ROTATION
  • DYNAMICS
  • PROFILES

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