A Test for the Effective Mass-to-Light Ratio in Strong-Lensing Galaxy Clusters

by Mr. Tal Taiber

Bgu

at Astrophysics and Cosmology Seminar

Wed, 13 Jan 2021, 11:50
Sacta-Rashi Building for Physics (54), room 207

Abstract

Strong lensing by galaxy clusters is a unique probe for the distribution of matter in them, mostly governed by the invisible dark matter component. Increasing numbers of individual galaxy clusters analyzed over the past decade, together with large sky surveys, call for automated lens-mapping methods that could be operated on large sets of clusters. In this talk I will present key aspects of my master thesis, which includes a reformulation of the Light-Traces-Mass (LTM) methodology for the analysis of strong lensing in galaxy clusters, and the application of the revised methodology to five intermediate redshift (z~0.4) lensing clusters as a proof-of-concept. I will describe the revisions made to the method, including an explicit definition of the cluster’s Mass-to-Light (M/L) ratio, and discuss whether the method can be used in an automated fashion, based on these results. I will show the results from such an automated analysis, in which a uniform M/L for all clusters is assumed, and discuss future research avenues.

Created on 11-01-2021 by Zitrin, Adi (zitrin)
Updaded on 11-01-2021 by Zitrin, Adi (zitrin)