X-ray surface brightness observations of galaxy clusters, cosmic opacity and the limits on the matter density parameter

被引：8

作者：

Holanda, R. F. L. ^{[1
,2
,3
]}

Silva, Kamilla V. R. A. ^{[3
]}

Busti, V. C. ^{[4
,5
]}

机构：

[1] Univ Fed Sergipe, Dept Fis, BR-49100000 Sao Cristovao, SE, Brazil

[2] Univ Fed Rio Grande do Norte, Dept Fis, BR-59078970 Natal, RN, Brazil

[3] Univ Fed Campina Grande, Dept Fis, BR-58429900 Campina Grande, PB, Brazil

[4] Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA

[5] Univ Sao Paulo, Dept Fis Matemat, Rua Matao 1371, BR-05508090 Sao Paulo, SP, Brazil

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2018年 / 03期

基金：

巴西圣保罗研究基金会;

关键词：

galaxy clusters; supernova type Ia; standard candles; X-rays; GAS MASS FRACTION; DARK ENERGY; GENERAL-RELATIVITY; COSMOLOGICAL CONSTRAINTS; DISTANCE-DUALITY; DUST; DEFINITION; CHANDRA; II;

D O I：

10.1088/1475-7516/2018/03/031

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In this work, we use two gas mass fraction samples of galaxy clusters obtained from their X-ray surface brightness observations jointly with recent H(z) data in a flat ACDM framework to impose limits on cosmic opacity. It is assumed that the galaxy clusters are in hydrostatic equilibrium and their gas mass fraction measurement is constant with redshift. We show that the current limits on the matter density parameter obtained from X-ray gas mass fraction test are strongly dependent on the cosmic transparency assumption even for a flat scenario. Our results are consistent with a transparent universe within 1 sigma c.l. in full agreement with other analyses which used type Ia supernovae, gamma ray burst and H(z) data.

引用

页数：13

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