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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

ID: 448196.0, MPI für Astronomie / Publikationen_mpia
Modelling galaxy-galaxy weak lensing with Sloan Digital Sky Survey groups
Authors:Li, Ran; Mo, H. J.; Fan, Zuhui; Cacciato, Marcello; van den Bosch, Frank C.; Yang, Xiaohu; More, Surhud
Date of Publication (YYYY-MM-DD):2009
Title of Journal:Monthly Notices of the Royal Astronomical Society
Journal Abbrev.:MNRAS
Start Page:1016
End Page:1030
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:We use galaxy groups selected from the Sloan Digital Sky Survey (SDSS) together with mass models for individual groups to study the galaxy-galaxy lensing signals expected from galaxies of different luminosities and morphological types. We compare our model predictions with the observational results obtained from the SDSS by Mandelbaum et al. for the same samples of galaxies. The observational results are well reproduced in a Lambda cold dark matter (LambdaCDM) model based on the Wilkinson Microwave Anisotropy Probe (WMAP) 3-yr data, but a LambdaCDM model with higher sigma8, such as the one based on the WMAP 1-yr data, significantly overpredicts the galaxy-galaxy lensing signal. We model, separately, the contributions to the galaxy-galaxy lensing signals from different galaxies: central versus satellite, early type versus late type and galaxies in haloes of different masses. We also examine how the predicted galaxy-galaxy lensing signal depends on the shape, density profile and the location of the central galaxy with respect to its host halo.
Free Keywords:methods: statistical; galaxies: haloes; dark matter; large-scale structure of Universe
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://adsabs.harvard.edu/abs/2009MNRAS.394.1016L [ID No:1]
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