Analyzing the 21-cm signal brightness temperature in the Universe with inhomogeneities

被引：0

作者：

Pandey, Shashank Shekhar ^{[1
]}

Halder, Ashadul ^{[1
]}

Majumdar, A. S. ^{[1
]}

机构：

[1] SN Bose Natl Ctr Basic Sci, Dept Astrophys & High Energy Phys, Block JD,Sect 3, Kolkata 700106, India

来源：

PHYSICAL REVIEW D | 2024年 / 110卷 / 04期

关键词：

COSMIC BACKREACTION; GENERAL-RELATIVITY; AVERAGE PROPERTIES; BLACK-HOLES; DARK-ENERGY; REIONIZATION; COSMOLOGY; FLUIDS;

D O I：

10.1103/PhysRevD.110.043531

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 A cold dark matter prediction could arise as an effect of the inhomogeneities present in the Universe.

引用

页数：18

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