Volume 18, Issue 1 ((Iranian Journal of Physics Research,Spring 2018)                   IJPR 2018, 18(1): 67-73 | Back to browse issues page

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Baghram S. Measuring the optical depth profile of galaxy clusters by kinetic Sunyaev-Zel'dovic effect . IJPR. 2018; 18 (1) :67-73
URL: http://ijpr.iut.ac.ir/article-1-2457-en.html
Department of Physics, Sharif University of Technology, Tehran, Iran , baghram@sharif.edu
Abstract:   (3439 Views)
baryonic matter distribution in the large-scale structures is one of the main questions in cosmology. This distribution can provide valuable information regarding  the processes of galaxy formation and evolution. On the other hand, the missing baryon problem is still under debate. One of the most important cosmological structures for studying the rate and  the distribution of the baryons is galaxy clusters. In this work, it is proposed that the kinetic Sunyaev-Zel'dovich effect in galaxy clusters, which has a supernova type Ia (SNe Ia) in their brightest central galaxy, can be used to obtain  the optical depth profile of the galaxy cluster. To obtain  this profile , the bulk velocity is calculated by SNe Ia. We show that for galaxy clusters in the redshift range of Z<0.15
, we can find the optical depth with 100 kpc resolution, which is the same as 1 arc minute resolution in cosmic microwave background observations.
Full-Text [PDF 17 kb]   (665 Downloads)    
Type of Study: Research | Subject: Gravitation and Cosmology

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