Detailed Mass Map of CL0024+1654 from Strong Lensing
Abstract
We construct a high resolution mass map of the z=0.39 cluster 0024+1654, based on parametric inversion of the associated gravitational lens. The lens creates eight well-resolved sub-images of a background galaxy, seen in deep imaging with HST. 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 <3% inside 107 ~h^{-1} kpc radius. The dark matter distribution we observe in CL0024 is far more smooth, symmetric, and nonsingular than in typical simulated clusters in either Omega=1 or Omega=0.3 CDM cosmologies. Integrated to 107 h^{-1} kpc radius, the rest-frame mass to light ratio is M/L_V = 276\pm 40 h (M/L_V)_solar.
Keywords
Cite
@article{arxiv.astro-ph/9801193,
title = {Detailed Mass Map of CL0024+1654 from Strong Lensing},
author = {J. Anthony Tyson and Greg P. Kochanski and Ian P. Dell'Antonio},
journal= {arXiv preprint arXiv:astro-ph/9801193},
year = {2009}
}
Comments
16 pages, 4 figures (3 .jpg, 1 .ps), minor changes to make consistent with the final ApJL article. To appear in ApJL, May 8 1998