Low-Redshift Observational Constraints on Dark Energy Cosmologies
Applying the Markov chain Monte Carlo algorithm and using low-redshift observational data, we put cosmological constraints on dark energy cosmologies. Our main aim is to show the influence of each data sample on the procedure of constraining. The main results of our analysis are as follows. In the c...
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Damghan university
2023-10-01
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| Series: | Iranian Journal of Astronomy and Astrophysics |
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| Online Access: | https://ijaa.du.ac.ir/article_360_19410b203537edb44fb33f87cf345c3c.pdf |
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| author | Mohammad Malekjani |
| author_facet | Mohammad Malekjani |
| author_sort | Mohammad Malekjani |
| collection | DOAJ |
| description | Applying the Markov chain Monte Carlo algorithm and using low-redshift observational data, we put cosmological constraints on dark energy cosmologies. Our main aim is to show the influence of each data sample on the procedure of constraining. The main results of our analysis are as follows. In the case of the Pantheon catalog of supernovae, one can put approximately three times tighter constraints on the cosmological parameters compared to the early Gold dataset. Combining the Pantheon with the Hubble data, we obtain $\sim 1.5$ times tighter constraints compared to the Pantheon solely. We show that in cluster scale due to low growth rate data with large error bars, one cannot put tight constraints on the cosmological parameters. Combining the expansion and growth rate data leads to tighter constraints on the cosmological parameters. While the local value of Hubble constant $H_0$ has a $\sim 3.4 \sigma$ tension with Planck inferred result, we show that by combining the expansion and growth data with local $H_0$ data, the tension is alleviated to a $1.7 \sigma$. Finally joining the Pantheon, Hubble data, growth rate, $H_0$ with the BAO measurements gets roughly $7-8\%$ tighter constraints on the matter density and Hubble constant parameters. |
| format | Article |
| id | doaj-art-cc00d53a540a41d8b7f4ff9af748c053 |
| institution | Kabale University |
| issn | 2322-4924 2383-403X |
| language | English |
| publishDate | 2023-10-01 |
| publisher | Damghan university |
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| series | Iranian Journal of Astronomy and Astrophysics |
| spelling | doaj-art-cc00d53a540a41d8b7f4ff9af748c0532025-01-12T10:07:14ZengDamghan universityIranian Journal of Astronomy and Astrophysics2322-49242383-403X2023-10-0110216519010.22128/ijaa.2023.719.1164360Low-Redshift Observational Constraints on Dark Energy CosmologiesMohammad Malekjani0Dept. of Physics. Bu-Ali Sina UniversityApplying the Markov chain Monte Carlo algorithm and using low-redshift observational data, we put cosmological constraints on dark energy cosmologies. Our main aim is to show the influence of each data sample on the procedure of constraining. The main results of our analysis are as follows. In the case of the Pantheon catalog of supernovae, one can put approximately three times tighter constraints on the cosmological parameters compared to the early Gold dataset. Combining the Pantheon with the Hubble data, we obtain $\sim 1.5$ times tighter constraints compared to the Pantheon solely. We show that in cluster scale due to low growth rate data with large error bars, one cannot put tight constraints on the cosmological parameters. Combining the expansion and growth rate data leads to tighter constraints on the cosmological parameters. While the local value of Hubble constant $H_0$ has a $\sim 3.4 \sigma$ tension with Planck inferred result, we show that by combining the expansion and growth data with local $H_0$ data, the tension is alleviated to a $1.7 \sigma$. Finally joining the Pantheon, Hubble data, growth rate, $H_0$ with the BAO measurements gets roughly $7-8\%$ tighter constraints on the matter density and Hubble constant parameters.https://ijaa.du.ac.ir/article_360_19410b203537edb44fb33f87cf345c3c.pdfcosmologydark energyobservational data |
| spellingShingle | Mohammad Malekjani Low-Redshift Observational Constraints on Dark Energy Cosmologies Iranian Journal of Astronomy and Astrophysics cosmology dark energy observational data |
| title | Low-Redshift Observational Constraints on Dark Energy Cosmologies |
| title_full | Low-Redshift Observational Constraints on Dark Energy Cosmologies |
| title_fullStr | Low-Redshift Observational Constraints on Dark Energy Cosmologies |
| title_full_unstemmed | Low-Redshift Observational Constraints on Dark Energy Cosmologies |
| title_short | Low-Redshift Observational Constraints on Dark Energy Cosmologies |
| title_sort | low redshift observational constraints on dark energy cosmologies |
| topic | cosmology dark energy observational data |
| url | https://ijaa.du.ac.ir/article_360_19410b203537edb44fb33f87cf345c3c.pdf |
| work_keys_str_mv | AT mohammadmalekjani lowredshiftobservationalconstraintsondarkenergycosmologies |