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

Details Evidence for dark matter in different scales from the KLUN galaxy sample Evidence for dark matter in different scales from the KLUN galaxy sample

1999-09-03

arxiv.org/abs/astro-ph/9909064v1

Astronomy and Astrophysics

Astrophysics

4 pages. To appear in IAU Colloq. 174, Small Galaxy Groups (meeting held in Turku, Finland, June 1999), eds. M. Valtonen & Chr

Scientific paper

The KLUN (Kinematics of the Local UNiverse) sample of 6600 spiral galaxies is used in studying dark matter in different scales: Type dependence of the zero-point of Tully-Fisher relation indicates M/L \approx 9 -- 16 in galactic scale. Preliminary results from a study of selection effect influencing double galaxies give a larger value M/L \approx 30 -- 50. Study of the Perseus-Pisces supercluster, using Malmquist bias corrected TF distances and Tolman-Bondi solutions indicates M/L \approx 200 -- 600 for the large clusters. Application of developed 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 \Omega_0 is very small (0.01) or major part of the matter is uniformly distributed dark matter.

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