A possible late-time transition of M B inferred via neural networks
Article Type
Research Article
Publication Title
Journal of Cosmology and Astroparticle Physics
Abstract
The strengthening of tensions in the cosmological parameters has led to reconsidering the 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 ≈ 1 region.
DOI
10.1088/1475-7516/2024/09/060
Publication Date
9-1-2024
Recommended Citation
Mukherjee, Purba; Dialektopoulos, Konstantinos F.; Said, Jackson Levi; and Mifsud, Jurgen, "A possible late-time transition of M B inferred via neural networks" (2024). Journal Articles. 4563.
https://digitalcommons.isical.ac.in/journal-articles/4563