Interacting two-fluid viscous dark energy models in a non-flat universe
We study the evolution of the dark energy parameter within the scope of a spatially non-flat and isotropic Friedmann-Robertson-Walker model filled with barotropic fluid and bulk viscous stresses. We have obtained cosmological solutions that do not have a Big Rip singularity, and concluded that in bo...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English English |
| Published: |
Institute of Physics Publishing
2013
|
| Online Access: | http://psasir.upm.edu.my/id/eprint/30082/ http://psasir.upm.edu.my/id/eprint/30082/1/Interacting%20two.pdf |
| _version_ | 1848846577463984128 |
|---|---|
| author | Amirhashchi, Hassan Pradhan, Anirudh Zainuddin, Hishamuddin |
| author_facet | Amirhashchi, Hassan Pradhan, Anirudh Zainuddin, Hishamuddin |
| author_sort | Amirhashchi, Hassan |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | We study the evolution of the dark energy parameter within the scope of a spatially non-flat and isotropic Friedmann-Robertson-Walker model filled with barotropic fluid and bulk viscous stresses. We have obtained cosmological solutions that do not have a Big Rip singularity, and concluded that in both non-interacting and interacting cases the non-flat open Universe crosses the phantom region. We find that during the evolution of the Universe, the equation of state for dark energy ωD changes from ω eff D > -1 to ωeff D < -1, which is consistent with recent observations. |
| first_indexed | 2025-11-15T09:04:55Z |
| format | Article |
| id | upm-30082 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English English |
| last_indexed | 2025-11-15T09:04:55Z |
| publishDate | 2013 |
| publisher | Institute of Physics Publishing |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-300822015-09-08T01:24:04Z http://psasir.upm.edu.my/id/eprint/30082/ Interacting two-fluid viscous dark energy models in a non-flat universe Amirhashchi, Hassan Pradhan, Anirudh Zainuddin, Hishamuddin We study the evolution of the dark energy parameter within the scope of a spatially non-flat and isotropic Friedmann-Robertson-Walker model filled with barotropic fluid and bulk viscous stresses. We have obtained cosmological solutions that do not have a Big Rip singularity, and concluded that in both non-interacting and interacting cases the non-flat open Universe crosses the phantom region. We find that during the evolution of the Universe, the equation of state for dark energy ωD changes from ω eff D > -1 to ωeff D < -1, which is consistent with recent observations. Institute of Physics Publishing 2013-02 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/30082/1/Interacting%20two.pdf Amirhashchi, Hassan and Pradhan, Anirudh and Zainuddin, Hishamuddin (2013) Interacting two-fluid viscous dark energy models in a non-flat universe. Research in Astronomy and Astrophysic, 13 (2). pp. 129-138. ISSN 1674-4527 10.1088/1674-4527/13/2/001 English |
| spellingShingle | Amirhashchi, Hassan Pradhan, Anirudh Zainuddin, Hishamuddin Interacting two-fluid viscous dark energy models in a non-flat universe |
| title | Interacting two-fluid viscous dark energy models in a non-flat universe |
| title_full | Interacting two-fluid viscous dark energy models in a non-flat universe |
| title_fullStr | Interacting two-fluid viscous dark energy models in a non-flat universe |
| title_full_unstemmed | Interacting two-fluid viscous dark energy models in a non-flat universe |
| title_short | Interacting two-fluid viscous dark energy models in a non-flat universe |
| title_sort | interacting two-fluid viscous dark energy models in a non-flat universe |
| url | http://psasir.upm.edu.my/id/eprint/30082/ http://psasir.upm.edu.my/id/eprint/30082/ http://psasir.upm.edu.my/id/eprint/30082/1/Interacting%20two.pdf |