Measuring Hubble constant using localized and unlocalized fast radio bursts
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arXiv
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| Autores principales: | , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866915347346489344 |
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| author | Gao, D. H. Wu, Q. Hu, J. P. Yi, S. X. Zhou, X. Wang, F. Y. Dai, Z. G. |
| author_facet | Gao, D. H. Wu, Q. Hu, J. P. Yi, S. X. Zhou, X. Wang, F. Y. Dai, Z. G. |
| contents | The Hubble constant ($H_0$) is one of the most important parameters in the standard $\rm ΛCDM$ model. The measurements given by the main two methods show a gap larger than $4σ$, which is known as Hubble tension. Fast radio bursts (FRBs) are extragalactic pulses with durations of milliseconds. They can be used as cosmological probes. We constrain $H_0$ using localized and nonlocalized FRBs. We first used 108 localized FRBs to constrain $H_0$ using the probability distributions of \DMhost and \DMIGM from the IllustrisTNG simulation. Then, we used a Monte Carlo sampling to calculate the pseudo-redshift distributions of 527 nonlocalized FRBs from CHIME observations. The 108 localized FRBs yield a constraint of $H_0=69.40_{-1.97}^{+2.14}$ ${\rm km\ s^{-1} Mpc^{-1}}$, which lies between the early- and late-time values. The constraint of $H_{0}$ from nonlocalized FRBs yields $H_0=68.81_{-0.68}^{+0.68}$ ${\rm km\ s^{-1} Mpc^{-1}}$. This result indicates that the uncertainty on the constraint of $H_0$ drops to $\sim1\%$ when the number of localized FRBs is increased to $\sim500$. These uncertainties only include the statistical error. The systematic errors are also discussed and play a dominant role in the current sample. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_03994 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Measuring Hubble constant using localized and unlocalized fast radio bursts Gao, D. H. Wu, Q. Hu, J. P. Yi, S. X. Zhou, X. Wang, F. Y. Dai, Z. G. Cosmology and Nongalactic Astrophysics High Energy Astrophysical Phenomena The Hubble constant ($H_0$) is one of the most important parameters in the standard $\rm ΛCDM$ model. The measurements given by the main two methods show a gap larger than $4σ$, which is known as Hubble tension. Fast radio bursts (FRBs) are extragalactic pulses with durations of milliseconds. They can be used as cosmological probes. We constrain $H_0$ using localized and nonlocalized FRBs. We first used 108 localized FRBs to constrain $H_0$ using the probability distributions of \DMhost and \DMIGM from the IllustrisTNG simulation. Then, we used a Monte Carlo sampling to calculate the pseudo-redshift distributions of 527 nonlocalized FRBs from CHIME observations. The 108 localized FRBs yield a constraint of $H_0=69.40_{-1.97}^{+2.14}$ ${\rm km\ s^{-1} Mpc^{-1}}$, which lies between the early- and late-time values. The constraint of $H_{0}$ from nonlocalized FRBs yields $H_0=68.81_{-0.68}^{+0.68}$ ${\rm km\ s^{-1} Mpc^{-1}}$. This result indicates that the uncertainty on the constraint of $H_0$ drops to $\sim1\%$ when the number of localized FRBs is increased to $\sim500$. These uncertainties only include the statistical error. The systematic errors are also discussed and play a dominant role in the current sample. |
| title | Measuring Hubble constant using localized and unlocalized fast radio bursts |
| topic | Cosmology and Nongalactic Astrophysics High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2410.03994 |