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.
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页数：18
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