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Evidence for dark matter on different scales from the KLUN galaxy sample

Published online by Cambridge University Press:  12 April 2016

M. O. Hanski ,
P. Teerikorpi ,
T. Ekholm ,
G. Theureau ,
Yu. Baryshev ,
G. Paturel  and
P. Lanoix
M. O. Hanski
Affiliation:
Tuorla Observatory, Piikkiö, Finland
P. Teerikorpi
Affiliation:
Tuorla Observatory, Piikkiö, Finland
T. Ekholm
Affiliation:
Tuorla Observatory, Piikkiö, Finland
G. Theureau
Affiliation:
Osservatorio Astronomico di Capodimonte, Naples, Italy
Yu. Baryshev
Affiliation:
Astronomical Institute of St.Petersburg University, St.Petersburg, Russia
G. Paturel
Affiliation:
Observatoire de Lyon, Lyon, France
P. Lanoix
Affiliation:
Observatoire de Lyon, Lyon, France

Extract

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The KLUN (Kinematics of the Local UNiverse) sample of 6600 spiral galaxies is used in studying dark matter on different scales:

  1. • The Morphological Type dependence of the zero-point of the Tully-Fisher relation indicates mass to light ratio M/L ≈ 9 − 16 on galactic scales.

  2. • Preliminary results from a study of selection effects influencing double galaxies give a larger value M/L ≈ 30 − 50.

  3. • Study of the Perseus-Pisces supercluster, using Malmquist bias corrected TF distances and Tolman-Bondi solutions indicates M/L ≈ 200 − 600 for large clusters. Similar results were obtained in our previous work on Virgo galaxies.

  4. • Application of a modified version of Sandage-Tammann-Hardy test of the linearity of Hubble law inside the observed hierarchical (fractal) galaxy distribution up to 200 Mpc suggests that either Ω0 is very small (0.01) or the major part of the matter is uniformly distributed dark matter.

Type
Part 5. Dark Matter and Clustering
Information
International Astronomical Union Colloquium , Volume 174: Small Galaxy Groups , 2000 , pp. 457 - 461
Copyright
Copyright © Astronomical Society of the Pacific 2000

References

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