MULTIBAND PHOTOMETRY OF RICH ABELL CLUSTERS: CONSTRAINTS ON THE DWARF STAR CONTENT OF DARK MATTER

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