Real-time cosmology with SKA
Abstract In this work, we investigate what role the redshift-drift data of the Square Kilometre Array (SKA) will play in the cosmological parameter estimation in the future. To test the constraint capability of the redshift-drift data of SKA-only, the $$\Lambda $$ Λ CDM model is chosen as a referenc...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2020-04-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | http://link.springer.com/article/10.1140/epjc/s10052-020-7863-4 |
| _version_ | 1811288023177887744 |
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| author | Yan Liu Jing-Fei Zhang Xin Zhang |
| author_facet | Yan Liu Jing-Fei Zhang Xin Zhang |
| author_sort | Yan Liu |
| collection | DOAJ |
| description | Abstract In this work, we investigate what role the redshift-drift data of the Square Kilometre Array (SKA) will play in the cosmological parameter estimation in the future. To test the constraint capability of the redshift-drift data of SKA-only, the $$\Lambda $$ Λ CDM model is chosen as a reference model. We find that using the SKA1 mock data, the $$\Lambda $$ Λ CDM model can be loosely constrained, while the model can be well constrained when the SKA2 mock data are used. When the mock data of SKA are combined with the data of the European Extremely Large Telescope (E-ELT), the constraints can be significantly improved, becoming almost as good as the data combination of the type Ia supernovae observation (SN), the cosmic microwave background observation (CMB), and the baryon acoustic oscillations observation (BAO). Furthermore, we explore the impact of the redshift-drift data of SKA on the basis of SN+CMB+BAO+E-ELT in the $$\Lambda $$ Λ CDM model, the wCDM model, the CPL model, and the HDE model. We find that the redshift-drift measurement of SKA could help to significantly improve the constraints on dark energy and could break the degeneracy between the cosmological parameters. Therefore, we conclude that redshift-drift observation of SKA would provide a good improvement in the cosmological parameter estimation in the future and has the enormous potential to be one of the most competitive cosmological probes in constraining dark energy. |
| first_indexed | 2024-04-13T03:29:57Z |
| format | Article |
| id | doaj.art-d477378dceca4dd596a2299bebf64b83 |
| institution | Directory Open Access Journal |
| issn | 1434-6044 1434-6052 |
| language | English |
| last_indexed | 2024-04-13T03:29:57Z |
| publishDate | 2020-04-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj.art-d477378dceca4dd596a2299bebf64b832022-12-22T03:04:32ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60441434-60522020-04-0180411110.1140/epjc/s10052-020-7863-4Real-time cosmology with SKAYan Liu0Jing-Fei Zhang1Xin Zhang2Department of Physics, College of Sciences, Northeastern UniversityDepartment of Physics, College of Sciences, Northeastern UniversityDepartment of Physics, College of Sciences, Northeastern UniversityAbstract In this work, we investigate what role the redshift-drift data of the Square Kilometre Array (SKA) will play in the cosmological parameter estimation in the future. To test the constraint capability of the redshift-drift data of SKA-only, the $$\Lambda $$ Λ CDM model is chosen as a reference model. We find that using the SKA1 mock data, the $$\Lambda $$ Λ CDM model can be loosely constrained, while the model can be well constrained when the SKA2 mock data are used. When the mock data of SKA are combined with the data of the European Extremely Large Telescope (E-ELT), the constraints can be significantly improved, becoming almost as good as the data combination of the type Ia supernovae observation (SN), the cosmic microwave background observation (CMB), and the baryon acoustic oscillations observation (BAO). Furthermore, we explore the impact of the redshift-drift data of SKA on the basis of SN+CMB+BAO+E-ELT in the $$\Lambda $$ Λ CDM model, the wCDM model, the CPL model, and the HDE model. We find that the redshift-drift measurement of SKA could help to significantly improve the constraints on dark energy and could break the degeneracy between the cosmological parameters. Therefore, we conclude that redshift-drift observation of SKA would provide a good improvement in the cosmological parameter estimation in the future and has the enormous potential to be one of the most competitive cosmological probes in constraining dark energy.http://link.springer.com/article/10.1140/epjc/s10052-020-7863-4 |
| spellingShingle | Yan Liu Jing-Fei Zhang Xin Zhang Real-time cosmology with SKA European Physical Journal C: Particles and Fields |
| title | Real-time cosmology with SKA |
| title_full | Real-time cosmology with SKA |
| title_fullStr | Real-time cosmology with SKA |
| title_full_unstemmed | Real-time cosmology with SKA |
| title_short | Real-time cosmology with SKA |
| title_sort | real time cosmology with ska |
| url | http://link.springer.com/article/10.1140/epjc/s10052-020-7863-4 |
| work_keys_str_mv | AT yanliu realtimecosmologywithska AT jingfeizhang realtimecosmologywithska AT xinzhang realtimecosmologywithska |