The dark matter distribution in MS 2137-23 from the modeling of the multiple arc systems

Details The dark matter distribution in MS 2137-23 from the modeling of the multiple arc systems The dark matter distribution in MS 2137-23 from the modeling of the multiple arc systems

Apr 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...407...33m&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 407, no. 1, p. 33-45.

Astronomy and Astrophysics

Astrophysics

115

Astronomical Models, Dark Matter, Galactic Clusters, Gravitational Lenses, Arcs, Mass Distribution

Scientific paper

The cluster lens MS 2137-23 in which Fort et al. (1992) found a tangential arc, a radial arc, and some arclets is modeled. It is shown that only by using observational constraints given by the CCD images is it possible to model the two arcs and predict the positions of the three arclets. The core radius of the cluster is small, probably 3 times smaller than the value generally adopted. The amount of dark matter is large with a mass-to-light ratio of about 100 and a line-of-sight velocity dispersion of 1000 km/s. Future observations needed to confirm the model of this case of lensing, which should provide the first reliable insights to the dark matter distribution in rich clusters of galaxies, are reviewed.

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