Bulk Viscous Cosmology : Unified Dark Matter
Joint Authors
Source
Issue
Vol. 2011, Issue 2011 (31 Dec. 2011), pp.1-6, 6 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2010-09-16
Country of Publication
Egypt
No. of Pages
6
Main Subjects
Abstract EN
The bulk viscosity is introduced to model the current observational cosmos and the unified dark matter (dark matter and dark energy).
The viscous unified model assumes that the universe is filled with a single nonperfect fluid with a bulk viscosity.
We review the general framework for the viscous cosmology model building finding that the Hubble parameter has possessed a direct connection with the bulk viscosity coefficient.
For the concrete form of the bulk viscosity, the Hubble parameter which has the scaling relation with the redshift can be obtained generally.
We discuss two viscosity models and the cosmological evolution to which they lead in detail.
Using SNe Ia data, CMB shift, as well as BAO observations, the viscosity model parameters can be fitted very well.
We also briefly review the fitting method in this paper.
American Psychological Association (APA)
Dou, Xu& Meng, Xin-He. 2010. Bulk Viscous Cosmology : Unified Dark Matter. Advances in Astronomy،Vol. 2011, no. 2011, pp.1-6.
https://search.emarefa.net/detail/BIM-501475
Modern Language Association (MLA)
Dou, Xu& Meng, Xin-He. Bulk Viscous Cosmology : Unified Dark Matter. Advances in Astronomy No. 2011 (2011), pp.1-6.
https://search.emarefa.net/detail/BIM-501475
American Medical Association (AMA)
Dou, Xu& Meng, Xin-He. Bulk Viscous Cosmology : Unified Dark Matter. Advances in Astronomy. 2010. Vol. 2011, no. 2011, pp.1-6.
https://search.emarefa.net/detail/BIM-501475
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-501475