2001A&A...378..748K


C.D.S. - SIMBAD4 rel 1.7 - 2020.08.09CEST13:52:16

2001A&A...378..748K - Astronomy and Astrophysics, volume 378, 748-755 (2001/11-2)

Cluster mass profiles from weak lensing: The influence of substructure.

KING L.J., SCHNEIDER P. and SPRINGEL V.

Abstract (from CDS):

The tidal gravitational field of a cluster distorts the shapes of background galaxies. This signature can be used to place constraints on the mass profile of the cluster, using a maximum likelihood analysis to find the best-fit parameterised model. In Schneider et al. (2000A&A...353...41S) and King & Schneider (2001A&A...369....1K) we investigated how accurately parameters can be obtained, concentrating on smooth profiles. Here, we consider a realistic model for substructure in a cluster (from N-body simulations), in order to see what influence this has on the recovery of parameters. We find that for a typical cluster at zd=0.2, the presence of substructure increases the error on parameters recovered from weak lensing data by ≃3%. Even doubling the substructure amplitude induces only a ≃10% increase in the parameter dispersion: this bodes well for our method.

Abstract Copyright:

Journal keyword(s): dark matter - gravitational lensing - large-scale structure of Universe - galaxies: clusters: general - methods: statistical

Simbad objects: 2

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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 - 2020
#notes
1 ACO 370 ClG 02 39 50.5 -01 35 08           ~ 641 0
2 ACO 1689 ClG 13 11 29.5 -01 20 28           ~ 1025 0

    Equat.    Gal    SGal    Ecl

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2020.08.09-13:52:16

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