Mass-to-light ratio gradients in early-type galaxy haloes

  title={Mass-to-light ratio gradients in early-type galaxy haloes},
  author={Nicola R. Napolitano and Massimo Capaccioli and Aaron J. Romanowsky and Nigel Douglas and Michael R. Merrifield and Konrad H. Kuijken and Magda Arnaboldi and Ortwin E. Gerhard and Kenneth C. Freeman},
Owing to the fact that the near future should see a rapidly expanding set of probes of the halo masses of individual early-type galaxies, we introduce a convenient parameter for characterizing the halo masses from both observational and theoretical results: ∇ Υ , the logarithmic radial gradient of the mass-to-light ratio. Using halo density profiles from… CONTINUE READING