Abstract Details
| Name: Shashank Shekhar Pandey Affiliation: S. N. Bose National Centre for Basic Sciences, Kolkata Conference ID: ASI2024_515 Title : Analyzing the 21-cm signal brightness temperature in the Universe with inhomogeneities Authors and Co-Authors : Shashank Shekhar Pandey, Ashadul Halder, A. S. Majumdar Abstract Type : Oral Abstract Category : Galaxies and Cosmology Abstract : We explore the 21-cm signal in our Universe containing inhomogeneous matter distribution at considerably large scales. Employing Buchert's averaging procedure in the context of a model of spacetime with multiple inhomogeneous domains, we evaluate the effect of our model parameters on the observable 21-cm signal brightness temperature. Our model parameters are constrained through the Markov Chain Monte Carlo method using the Union 2.1 supernova Ia observational data. We find that a significant dip in the brightness temperature compared to the $\Lambda$CDM prediction could arise as an effect of the inhomogeneities present in the Universe. |