A test for the redshift dependence of $σ_8$ using $fσ_8$ measurements
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arXiv
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| Auteurs principaux: | , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866911935428034560 |
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| author | Manna, Siddhant Desai, Shantanu |
| author_facet | Manna, Siddhant Desai, Shantanu |
| contents | We search for a redshift dependence of $σ_8^0$ using 23 growth rate measurements from redshift space distortions and peculiar velocity measurements as a consistency check of $Λ$CDM. For this purpose we use the dataset from arXiv:1806.10822 consisting of 22 measurements, which has been vetted for internal consistencies. Eighteen of these measurements have been obtained from the Gold-2017 sample, collated from multiple redshift space distortion surveys between 2009 and 2016, whereas the remaining four have been obtained from the eBOSS DR14 quasar survey. We also added one additional data point from the BOSS DR12 CMASS galaxy sample. We find that for this dataset the $σ_8^0$ values are consistent between the low redshift and high redshift samples using three different redshift cuts. This implies that the growth rate measurements are consistent with a constant $σ_8^0$ in accord with $Λ$CDM, assuming there are no uncontrolled systematics in this dataset. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_10931 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | A test for the redshift dependence of $σ_8$ using $fσ_8$ measurements Manna, Siddhant Desai, Shantanu Cosmology and Nongalactic Astrophysics We search for a redshift dependence of $σ_8^0$ using 23 growth rate measurements from redshift space distortions and peculiar velocity measurements as a consistency check of $Λ$CDM. For this purpose we use the dataset from arXiv:1806.10822 consisting of 22 measurements, which has been vetted for internal consistencies. Eighteen of these measurements have been obtained from the Gold-2017 sample, collated from multiple redshift space distortion surveys between 2009 and 2016, whereas the remaining four have been obtained from the eBOSS DR14 quasar survey. We also added one additional data point from the BOSS DR12 CMASS galaxy sample. We find that for this dataset the $σ_8^0$ values are consistent between the low redshift and high redshift samples using three different redshift cuts. This implies that the growth rate measurements are consistent with a constant $σ_8^0$ in accord with $Λ$CDM, assuming there are no uncontrolled systematics in this dataset. |
| title | A test for the redshift dependence of $σ_8$ using $fσ_8$ measurements |
| topic | Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2406.10931 |