| 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 : | Shashank Shekhar Pandey, Ashadul Halder, A. S. Majumdar |
| Authors Affiliation: | 1. Shashank Shekhar Pandey, Ashadul Halder, A. S. Majumdar Affiliation (Dept. of Astrophysics & High Energy Physics, Block - JD, Sector - III, Salt Lake, Kolkata - 700106) |
| Mode of Presentation: | 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. |
