@inproceedings{244c26fcae804c50bb35e1caee1f5b84,
title = "Constraining the halo size of galaxies in cluster cores through strong lensing analysis",
abstract = "We combine strong gravitational lensing (SL) analysis of galaxy clusters' core with measurements of cluster members' velocity dispersion to investigate the matter content of galaxies in clusters. While lensing usually constrains the overall, projected mass density, the innovative use of velocity dispersion measurements as a proxy for masses of individual cluster members breaks inherent degeneracies and allows us to refine the constraints on single galaxy masses, on the galaxy mass-to-light scaling relation, and as a result to refine the constraints on the cluster dark matter map, a high-end goal of lens modelling. We present the SL analysis of the core of the galaxy cluster Abell 383, in which we use velocity dispersion measurements of 21 individual cluster members, obtained with MMT's Hectospec. The knowledge of cluster member velocity dispersions improves the fit by 20% in terms of the rms of the image reproduction, while constraints on the mass parameters improve by ∼ 10% for the DH and by ∼ 50% for the galaxy component. We find that galaxies in cluster cores have DM halos highly truncated, which is consistent with numerical simulations predictions. Moreover, stronger constraints on the mass profiles of individual galaxies are obtained by performing the surface brightness reconstruction of the southern giant arc.",
keywords = "Dark matter, Galaxy cluster, Galaxy halos, Gravitational lensing",
author = "Anna Monna and Stella Seitz and Adi Zitrin and Geller, {Margaret J.}",
note = "Publisher Copyright: Copyright {\textcopyright} 2018 by the Editors.All rights reserved.; 14th Marcel Grossman Meeting On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories ; Conference date: 12-07-2015 Through 18-07-2015",
year = "2018",
month = jan,
day = "1",
doi = "https://doi.org/10.1142/9789813226609_0383",
language = "American English",
series = "14th Marcel Grossman Meeting On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories, Proceedings",
publisher = "World Scientific Publishing Co. Pte Ltd",
pages = "3031--3036",
editor = "Massimo Bianchi and Jantzen, {Robert T} and Remo Ruffini",
booktitle = "14th Marcel Grossman Meeting On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories, Proceedings",
address = "Singapore",
}