CARMA MEASUREMENTS OF THE SUNYAEV-ZEL'DOVICH EFFECT IN RX J1347.5–1145

The Sunyaev - Zeldovich Effect

During passage through a cluster of galaxies some of the photons of the cosmic microwave background (CMB) radiation are scattered by electrons in the hot intracluster (IC) gas. The scattering slightly modifies the incident Planck spectrum, imprinting on it a unique spectral signature that was first described by Sunyaev & Zeldovich (1972). [The impact of hypothetical hot intergalactic gas on the...

Cobras/samba and Measurements of the Sunyaev-zeldovich Effect

The recently approved COBRAS/SAMBA cosmic microwave background (CMB) mission will also have a major impact on measurements of the Sunyaev-Zeldovich (SZ) effect. The frequency of three of the channels (150 GHz, 217 GHz, 353 GHz) are chosen to optimize measurements of the thermal and kinetic SZ effect mainly caused by hot gas in clusters of galaxies. Estimates of the number of detected clusters a...

Sunyaev–Zeldovich Effect

Reconstructing the Peak Distribution in the Sunyaev-Zeldovich Effect Surveys

We examine the ability of the Sunyaev-Zel’dovich effect (SZE) statistics proposed by Lee (2002) using numerical simulations. The statistics describe the distribution of the peak heights in the noise-contaminated SZE sky maps, and provide an analysis technique to sort out the noise-contamination effect and estimate the number density of real clusters. The method is devised to be suitable for the...

Temperature Bias in Measurements of The Hubble Constant Using The Sunyaev-Zeldovich Effect

Measurements of the Hubble constant to distant galaxy clusters using the Sunyaev-Zeldovich effect are systematically low in comparison to values obtained by other means. These measurements usually assume a spherical isothermal β model for the intracluster medium (ICM). Formation processes and recent mergers guarantee that real clusters are neither spherical nor isothermal. We present the result...