Prospects for Detection of Intracluster Gas Bulk Velocities Through the Sunyaev-Zel'dovich Effect

Preprint

1 April 2002

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.astro-ph/0204022

Abstract

Intracluster gas velocity gradients have been recently detected by the authors in the Centaurus cluster (Abell 3526) using the Doppler shift of X-ray spectral lines with ASCA Solid-state Imaging Spectrometers. The velocity gradient was found to be maximum along a line roughly perpendicular to the direction of the incoming subgroup Cen 45 and has a correspondent velocity difference of ~ (3.4+-1.1) x 1000 km/s within a ~10'-diameter region centered on the cD galaxy NGC 4696. Such bulk velocities should Comptonize the Cosmic Microwave Background Radiation producing variations of intensity and temperature that can be detectable in the near future with bolometers such as BOLOCAM . In this paper we realistically estimate the expected CMBR Comptonization for the central region of Abell 3526, using ASCA and ROSAT data to constrain the S-Z parameter expectations.

Keywords

All Related Versions

Version 1, 2002-04-01, ArXiv
Published version: The Astrophysical Journal, 575 (2), 634.

This publication has 0 references indexed in Scilit: