Year: 1998
Type: article
Abstract: We construct a high-resolution mass map of the z =0.39 cluster 0024+1654, based on a parametric inversion of the associated gravitational lens. The lens creates eight well-resolved subimages of a background galaxy, seen in deep imaging with the Hubble Space Telescope . Excluding mass concentrations centered on visible galaxies, more than 98% of the remaining mass is represented by a smooth concentration of dark matter centered near the brightest cluster galaxies, with a 35 h -1 kpc soft core. The asymmetry in the mass distribution is less than 3% inside 107 h -1 kpc radius. The dark matter distribution we observe in CL 0024 is far more smooth, symmetric, and nonsingular than in typical simulated clusters in either Ω=1 or Ω=0.3 cold dark matter cosmologies. Integrated to a 107 h -1 kpc radius, the rest-frame mass-to-light ratio is M / L V =276±40 h (M/L V ) ☉ .
Source: The Astrophysical Journal
DOI: 10.1086/311314
Institution: Alcatel-Lucent (France)
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2053222792