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Observational Searches for Dark Halos

Published online by Cambridge University Press:  04 August 2017

P.C. van der Kruit
P.C. van der Kruit*
Affiliation:
Kapteyn Astronomical Institute, P.O. Box 800 9700 AV Groningen, The Netherlands

Abstract

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A review of observational searches reveals the following constraints for the constituents of dark halos: (1) Optical searches show that these halos are not for a large fraction of their mass made up of dwarfs of spectral type M5 or earlier. (2) K-band (2.2 μ) searches virtually rule out all H- burning Main Sequence stars. (3) IRAS upper limits are consistent with black dwarfs of any age or Jupiters. (4) The inferred metallicity and M/L variations in the spheroid of NGC 7814 are consistent with the hypothesis that the dark matter consists of low mass objects that formed along with the luminous population II.

Type
Review Paper
Information
Symposium - International Astronomical Union , Volume 117: Dark Matter in the Universe , 1987 , pp. 415 - 424
Copyright
Copyright © Reidel 1987 

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