scholarly journals New constraints on dark energy from the observed growth of the most X-ray luminous galaxy clusters

2008 ◽  
Vol 387 (3) ◽  
pp. 1179-1192 ◽  
Author(s):  
A. Mantz ◽  
S. W. Allen ◽  
H. Ebeling ◽  
D. Rapetti
Keyword(s):  
Dark Energy ◽  
Galaxy Clusters ◽  
X Ray

scholarly journals X-ray Cluster Large Scale Structure and Cosmology

2005 ◽  
Vol 216 ◽  
pp. 373-380
Author(s):  
Marguerite Pierre
Keyword(s):  
Dark Energy ◽  
Galaxy Clusters ◽  
Large Scale ◽  
Scaling Law ◽  
Large Scale Structure ◽  
Short Review ◽  
Scale Structure ◽  
X Ray ◽  
Recent Advances

We outline the main arguments in favor of cosmological X-ray surveys of galaxy clusters. We summarize recent advances in our understanding of cluster physics. After a short review of past surveys, we present the scientific motivations of the XMM Large Scale Structure survey. We further illustrate how such a survey can help constrain the nature of the dark energy as well as cluster scaling law evolution, i.e. non-gravitational physics.

scholarly journals Probing dark energy with the next generation X-ray surveys of galaxy clusters

2012 ◽  
Vol 423 (3) ◽  
pp. 2503-2517 ◽  
Author(s):  
B. Sartoris ◽  
S. Borgani ◽  
P. Rosati ◽  
J. Weller
Keyword(s):  
Dark Energy ◽  
Galaxy Clusters ◽  
Generation X ◽  
Next Generation ◽  
X Ray

CONSTRAINING DARK ENERGY AND GRAVITY WITH X-RAY GALAXY CLUSTERS

2009 ◽  
Author(s):  
D. RAPETTI ◽  
S. W. ALLEN ◽  
A. MANTZ ◽  
R. G. MORRIS ◽  
H. EBELING ◽  
...  
Keyword(s):  
Dark Energy ◽  
Galaxy Clusters ◽  
X Ray

scholarly journals New observational constraints on interacting dark energy using galaxy clusters virial equilibrium states

2019 ◽  
Vol 490 (2) ◽  
pp. 1944-1952
Author(s):  
M Le Delliou ◽  
R J F Marcondes ◽  
G B Lima Neto
Keyword(s):  
Dark Energy ◽  
Galaxy Clusters ◽  
Gravitational Lensing ◽  
Coupling Parameter ◽  
Interaction Strength ◽  
Dynamical Evolution ◽  
Optical Observations ◽  
Dark Sector ◽  
X Ray ◽  
Tightly Coupled

ABSTRACT The nature of the dark sector components of the Universe still remains one of the largest unknown. Among many possibilities, it has been speculated that dark matter and dark energy may be more tightly coupled than usually thought, one component interacting with the other. Here, we continue to explore the possible dark sector interaction through means of the Layzer–Irvine equation together with a model of an interacting dark sector applied to clusters of galaxies. We have selected galaxy clusters that have their mass profiles determined by gravitational lensing effect (optical observations) and have their intracluster gas temperatures measured from X-ray observations and spectral fit found in the literature. Using a simple model based on semi-analytical simulations, we derived a putative dynamical evolution of the clusters and used it to estimate the coupling parameter of the dark sector interaction. Through a Bayesian analysis, we obtain a 3σ detection of the interaction strength for 11 clusters at −0.027 ± 0.009 that translates in a compounded Universal equilibrium virial ratio, U/T, of $-0.61^{+0.04}_{-0.03}$. We note that the X-ray temperature determination is sometimes inconsistent, depending on the instrument and/or methodology used. The level of detection and these inconsistencies call for caution. We expect that future observations will give us a clearer indication of an eventual dark sector interaction.

scholarly journals Constraints on Dark Energy Models from Selected Galaxy Clusters (S-Z + X-Ray Data) and Gravitational Lensing Data

2016 ◽  
Author(s):  
Alexander Bonilla Rivera ◽  
Jairo Ernesto Castillo Hernandez
Keyword(s):  
Dark Energy ◽  
Galaxy Clusters ◽  
Gravitational Lensing ◽  
Information Criterion ◽  
Gravitational Lens ◽  
X Rays ◽  
Hot Electron ◽  
X Ray ◽  
Angular Diameter Distance ◽  
Energy Models

The Sunyaev-Zeldovich effect (SZe) is a global distortion of Cosmic Microwave Bckground (CMB) spectrum as result of its interaction with a hot electron plasma in the intracluster medium for large gravitational virialized structures such as galaxy clusters. Furthermore, this hot gas of electrons emits X-Rays due to its fall in the gravitational potential well of the cluster. The analysis of SZe and X-Ray data, provide a method for calculating distances to galaxy clusters at any redshift (Angular diameter distance (dA) and gas mass fraction (fgas)). On the other side, many of these galaxy clusters produce a Strong Gravitational Lens effect (SGL), which has become an useful astrophysical tool for cosmology. We use these cosmological tests, in addition to the more traditional ones (SNIa, CMB, BAO), to constraint alternative models of dark energy (ωCDM, CPL, IDE, EDE) and study the history of expansion through the cosmographic parameters (H(z), q(z), j(z)). Using Akaike and Bayesian Information Criterion (AIC, BIC) we find that the ωCDM and ΛCDM models are the most favored by the observational data. In addition, we found that at low redshift appears an peculiar behavior of slowdown of aceleration, which occurs only on dynamical dark energy models using only galaxy clusters (dA,clusters + fgas).

scholarly journals Improved constraints on dark energy from Chandra X-ray observations of the largest relaxed galaxy clusters

2007 ◽  
Vol 383 (3) ◽  
pp. 879-896 ◽  
Author(s):  
S. W. Allen ◽  
D. A. Rapetti ◽  
R. W. Schmidt ◽  
H. Ebeling ◽  
R. G. Morris ◽  
...  
Keyword(s):  
Dark Energy ◽  
Galaxy Clusters ◽  
X Ray
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