|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'506'133
Articles rated: 2609
26 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
Constraints on dark energy from Chandra observations of the largest relaxed galaxy clusters | | S.W. Allen
; R.W. Schmidt
; H. Ebeling
; A.C. Fabian
; L. van Speybroeck
; | | Date: |
18 May 2004 | | Journal: | Mon.Not.Roy.Astron.Soc. 353 (2004) 457 | | Subject: | astro-ph | | Affiliation: | IoA Cambridge), R.W. Schmidt (Potsdam University), H. Ebeling (IfA, Hawaii), A.C. Fabian (IoA Cambridge), L. van Speybroeck (CfA | | Abstract: | We present constraints on the mean dark energy density, Omega_X and dark energy equation of state parameter, w_X, based on Chandra measurements of the X-ray gas mass fraction in 26 X-ray luminous, dynamically relaxed galaxy clusters spanning the redshift range 0.07-1, the same data require w_X<-0.7 at 95 per cent confidence. Similar results on the mean matter density and dark energy equation of state parameter, Omega_m=0.24pm0.04 and w_X=-1.20^{+0.24}_{-0.28}, are obtained by replacing the CMB data with standard priors on the Hubble constant and mean baryon density and assuming a flat geometry. | | Source: | arXiv, astro-ph/0405340 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER