2001A&A...370..743H


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.16CEST10:16:20

2001A&A...370..743H - Astronomy and Astrophysics, volume 370, 743-753 (2001/5-2)

The effect of distant large scale structure on weak lensing mass estimates.

HOEKSTRA H.

Abstract (from CDS):

We quantify the uncertainty in weak lensing mass estimates of clusters of galaxies, caused by distant (uncorrelated) large scale structure along the line of sight. We find that the effect is fairly small for deep observations (20<R<26) of massive clusters (σ=1000km/s) at intermediate redshifts, where the bulk of the sources are at high redshifts compared to the cluster redshift. If the lensing signal is measured out to 1.5h50–1Mpc the typical 1 σ relative uncertainty in the mass is about 6%. However, in other situations the induced uncertainty can be larger. For instance, in the case of nearby clusters, such as the Coma cluster, background structures introduce a considerable uncertainty in the mass, limiting the maximum achievable signal-to-noise ratio to ∼7, even for deep observations. The noise in the cluster mass estimate caused by the large scale structure increases with increasing aperture size, which will also complicate attempts to constrain cluster mass profiles at large distances from the cluster centre. However, the distant large scale structure studied here can be considered an additional (statistical) source of error, and by averaging the results of several clusters the noise is decreased.

Abstract Copyright:

Journal keyword(s): cosmology - gravitational lensing - galaxies: clusters - dark matter

Simbad objects: 2

goto Full paper

goto View the reference in ADS

Number of rows : 2

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 ClG 1054-03 ClG 10 57 00.2 -03 37 27     22     ~ 447 0
2 ACO 1656 ClG 12 59 48.7 +27 58 50           ~ 4095 2

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2001A&A...370..743H and select 'bookmark this link' or equivalent in the popup menu


2019.10.16-10:16:20

© Université de Strasbourg/CNRS

    • Contact