A dearth of dark matter in ordinary elliptical galaxies.

Romanowsky, Aaron J; Douglas, Nigel G; Arnaboldi, Magda; Kuijken, Konrad; Merrifield, Michael R; Napolitano, Nicola R; Capaccioli, Massimo; Freeman, Kenneth C · Science · 2003

Where this comes from

Record sourced from PubMed, PMID 12947033.
No licence information is recorded for this record.
Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.

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.

Read the full text

View on PubMed