A simple empirically motivated template for the thermal Sunyaev-Zel'dovich effect

被引：23

作者：

Efstathiou, George ^{[1
,2
]}

Migliaccio, Marina ^{[1
,2
,3
]}

机构：

[1] Kavli Inst Cosmol, Cambridge CB3 OHA, England

[2] Inst Astron, Cambridge CB3 OHA, England

[3] Univ Roma Tor Vergata, Dipartimento Fis, I-00113 Rome, Italy

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2012年 / 423卷 / 03期

关键词：

galaxies: clusters: intracluster medium; cosmic background radiation; cosmological parameters; POWER SPECTRUM; SIMULATIONS; GAS; PROFILES; ANISOTROPIES; COSMOLOGY; DENSITY; PROBE;

D O I：

10.1111/j.1365-2966.2012.21059.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We develop a model for the power spectrum of unresolved clusters of galaxies arising from the thermal SunyaevZeldovich (tSZ) effect. The model is based on a universal gas pressure profile constrained by X-ray observations and includes a parameter to describe departures from self-similar evolution. The model is consistent with recent Planck observations of the tSZ effect for X-ray clusters with redshifts z? 1 and reproduces the low amplitude for the tSZ inferred from recent ground-based observations. By adjusting two free parameters, we are able to reproduce the tSZ power spectra from recent numerical simulations to an accuracy that is well within theoretical uncertainties. Our model provides a simple, empirically motivated tSZ template that may be useful for the analysis of new experiments such as Planck.

引用

页码：2492 / 2497

页数：6

共 41 条

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