Multiband Photometry of Rich Abell Clusters: Constraints on the Dwarf Star Content of Dark Matter

Details Multiband Photometry of Rich Abell Clusters: Constraints on the Dwarf Star Content of Dark Matter Multiband Photometry of Rich Abell Clusters: Constraints on the Dwarf Star Content of Dark Matter

Oct 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997apj...488...44b&link_type=abstract

Astrophysical Journal v.488, p.44

Astronomy and Astrophysics

Astronomy

5

Cosmology: Dark Matter, Galaxies: Clusters: General, Galaxies: Photometry, Galaxies: Stellar Content, Stars: Late-Type

Scientific paper

We present results of large-aperture (~1') JK photometry and CCD BVRI photometry near the centers of three distant (0.11 <= z <= 0.22), rich Abell clusters of galaxies. The colors of the integrated light are consistent with those of nearby E and S0 galaxies. The absence of anomalous reddening implies that no more than 2 h-1% (1 sigma limit) of the dark matter in these clusters can be in the form of low-mass (~0.1 M&sun;) subdwarfs or old disk dwarfs. The limit increases to 3 h-1% if expressed in terms of zero-metallicity dwarfs. These results constrain the mass function of baryonic objects which might contribute to the dark matter.

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