A possible late-time transition of $M_B$ inferred via neural networks
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arXiv
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| Hauptverfasser: | , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866910694679511040 |
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| author | Mukherjee, Purba Dialektopoulos, Konstantinos F. Said, Jackson Levi Mifsud, Jurgen |
| author_facet | Mukherjee, Purba Dialektopoulos, Konstantinos F. Said, Jackson Levi Mifsud, Jurgen |
| contents | The strengthening of tensions in the cosmological parameters has led to a reconsideration of fundamental aspects of standard cosmology. The tension in the Hubble constant can also be viewed as a tension between local and early Universe constraints on the absolute magnitude $M_B$ of Type Ia supernova. In this work, we reconsider the possibility of a variation of this parameter in a model-independent way. We employ neural networks to agnostically constrain the value of the absolute magnitude as well as assess the impact and statistical significance of a variation in $M_B$ with redshift from the Pantheon+ compilation, together with a thorough analysis of the neural network architecture. We find an indication for a possible transition redshift at the $z\approx 1$ region. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_10502 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | A possible late-time transition of $M_B$ inferred via neural networks Mukherjee, Purba Dialektopoulos, Konstantinos F. Said, Jackson Levi Mifsud, Jurgen Cosmology and Nongalactic Astrophysics Machine Learning General Relativity and Quantum Cosmology The strengthening of tensions in the cosmological parameters has led to a reconsideration of fundamental aspects of standard cosmology. The tension in the Hubble constant can also be viewed as a tension between local and early Universe constraints on the absolute magnitude $M_B$ of Type Ia supernova. In this work, we reconsider the possibility of a variation of this parameter in a model-independent way. We employ neural networks to agnostically constrain the value of the absolute magnitude as well as assess the impact and statistical significance of a variation in $M_B$ with redshift from the Pantheon+ compilation, together with a thorough analysis of the neural network architecture. We find an indication for a possible transition redshift at the $z\approx 1$ region. |
| title | A possible late-time transition of $M_B$ inferred via neural networks |
| topic | Cosmology and Nongalactic Astrophysics Machine Learning General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2402.10502 |