Dark matter in the Hercules cluster

Details Dark matter in the Hercules cluster Dark matter in the Hercules cluster

Apr 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991aipc..222..409b&link_type=abstract

In: After the first three minutes; Proceedings of the 1st Astrophysics Workshop, Univ. of Maryland, College Park, Oct. 15-17, 19

Astronomy and Astrophysics

Astrophysics

1

Dark Matter, Galactic Clusters, Galactic Mass, Galactic Rotation, Gravitational Effects, Red Shift

Scientific paper

We study the distribution of dark matter in the Hercules cluster. Our dataset consists of 120 measurements of redshifts, 47 from 21-cm observations and 73 from optical work. Using the entire data set, we derive a velocity dispersion vs. radius profile and a value for the total dynamical mass of the cluster of 1.6 x 10 exp 15/h solar masses. With the 21-cm spectra we derive rotational velocities and masses for our radio detected galaxies. The ratio of the dynamical mass to the rotational mass is in the range from 5-25. This means that the bulk of the mass in A2151 is not contained within the luminous galaxies.

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