Speaker
Shashank Shekhar Pandey
(S. N. Bose National Centre for Basic Sciences, Kolkata, India)
Description
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 ΛCDM prediction could arise as an effect of the inhomogeneities present in the Universe.
| Field of contribution | Theory |
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Authors
Archan S. Majumdar
(S. N. Bose National Centre for Basic Sciences)
Ashadul Halder
(St. Xavier's College, Kolkata)
Shashank Shekhar Pandey
(S. N. Bose National Centre for Basic Sciences, Kolkata, India)
