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Observational Constraints on the Physical Parameters of Dark Matter Halos

Published online by Cambridge University Press:  26 May 2016

Claude Carignan
Claude Carignan*
Affiliation:
Département de physique and Observatoire du mont Mégantic, Université de Montréal, C.P. 6128, Succ. Centre-ville, Montréal, Qué., Canada H3C 3J7

Abstract

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After looking at the difference in the mass distribution between massive spiral and dwarf irregular (dIrr) and low surface brightness (LSB) galaxies, the central Dark Matter (DM) concentration (flat vs cuspy) in dwarf and LSB galaxies, derived from observations, will be examined. We will then present what kind of observational constraints can be put on the total mass and total extent of DM halos from the studies of individual galaxies, small groups, satellites' dynamics and tidal tails of interacting systems. Finally, we will discuss how limits on the physical parameters of DM halos could be set by deriving extended rotation curves beyond the HI radius (r > rHI), using either Lyα absorption or Hα emission observations.

Type
Part 13: The Shapes and Extents of Dark Halos
Information
Symposium - International Astronomical Union , Volume 220: Dark Matter in Galaxies , 2004 , pp. 447 - 454
Copyright
Copyright © Astronomical Society of the Pacific 2004 

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