SIMBAD references

2008ApJ...685L...9B - Astrophys. J., 685, L9-L12 (2008/September-3)

Comparison of cluster lensing profiles with ΛCDM predictions.

BROADHURST T., UMETSU K., MEDEZINSKI E., OGURI M. and REPHAELI Y.

Abstract (from CDS):

We derive lens distortion and magnification profiles of four well-known clusters observed with Subaru. Each cluster is very well fitted by the general form predicted for cold dark matter (CDM) dominated halos, with good consistency found between the independent distortion and magnification measurements. The inferred level of mass concentration is surprisingly high, 8<cvir<15 (<cvir≥10.39±0.91), compared to the relatively shallow profiles predicted by the ΛCDM model, cvir=5.06±1.10 (for <Mvir≥1.25x1015 Mh–1). This represents a 4 σ discrepancy, and includes the relatively modest effects of projection bias and profile evolution derived from N-body simulations, which oppose each other with little residual effect. In the context of CDM-based cosmologies, this discrepancy implies that clusters collapse earlier (z≥1) than predicted (z<0.5), when the universe was correspondingly denser.

Abstract Copyright:

Journal keyword(s): Cosmology: Observations - Cosmology: Dark Matter - Galaxies: Clusters: Individual: Alphanumeric: A1689 - galaxies: clusters: individual (A1703) - Galaxies: Clusters: Individual: Alphanumeric: A370 - galaxies: clusters: individual (RX J1347-11) - Cosmology: Gravitational Lensing

Status at CDS:  

Simbad objects: 8

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2008ApJ...685L...9B and select 'bookmark this link' or equivalent in the popup menu


2020.03.29-11:35:02

© Université de Strasbourg/CNRS

    • Contact