| Issue |
A&A
Volume 543, July 2012
|
|
|---|---|---|
| Article Number | A104 | |
| Number of page(s) | 8 | |
| Section | Cosmology (including clusters of galaxies) | |
| DOI | https://doi.org/10.1051/0004-6361/201117944 | |
| Published online | 04 July 2012 | |
Galaxy cluster angular-size data constraints on dark energy
1 Department of Astronomy, Beijing Normal University, 100875, Beijing, PR China
e-mail: chenyun@mail.bnu.edu.cn
2 Department of Physics, Kansas State University, 116 Cardwell Hall, Manhattan, KS 66506, USA
e-mail: ratra@phys.ksu.edu
Received: 25 August 2011
Accepted: 20 April 2012
We use angular size versus redshift data for galaxy clusters provided by Bonamente and collaborators to place constraints on model parameters of constant and time-evolving dark energy cosmological models. These constraints are compatible with those from other recent data, but are not very restrictive. A joint analysis of the galaxy cluster angular-size data with the more restrictive baryon acoustic oscillation peak length scale and supernova Type Ia apparent-magnitude data, favors a spatially flat cosmological model currently dominated by a time-independent cosmological constant, but does not exclude time-varying dark energy.
Key words: cosmology: miscellaneous / cosmology: theory / dark energy
© ESO, 2012
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.