Global 21-cm brightness temperature in viscous dark energy models

Halder, Ashadul; Pandey, Shashank; Majumdar, A. S.

doi:10.1088/1475-7516/2022/10/049

Cited by 7 publications

(2 citation statements)

References 167 publications

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“…Within this framework, a cosmologically consistent analysis of a string-inspired millicharged model was proposed in [90], where a detailed fit to the data is possibly consistent within a high-scale model. For some recent work on the EDGES anomaly, see [91][92][93][94].…”

Section: Hidden Sectors Intertwine Particle Physics and Cosmologymentioning

confidence: 99%

Particle Physics and Cosmology Intertwined

Nath

2024

Entropy

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While the standard model accurately describes data at the electroweak scale without the inclusion of gravity, beyond the standard model, physics is increasingly intertwined with gravitational phenomena and cosmology. Thus, the gravity-mediated breaking of supersymmetry in supergravity models leads to sparticle masses, which are gravitational in origin, observable at TeV scales and testable at the LHC, and supergravity also provides a candidate for dark matter, a possible framework for inflationary models and for models of dark energy. Further, extended supergravity models and string and D-brane models contain hidden sectors, some of which may be feebly coupled to the visible sector, resulting in heat exchange between the visible and hidden sectors. Because of the couplings between the sectors, both particle physics and cosmology are affected. The above implies that particle physics and cosmology are intrinsically intertwined in the resolution of essentially all of the cosmological phenomena, such as dark matter and dark energy, and in the resolution of cosmological puzzles, such as the Hubble tension and the EDGES anomaly. Here, we give a brief overview of the intertwining and its implications for the discovery of sparticles, as well as the resolution of cosmological anomalies and the identification of dark matter and dark energy as major challenges for the coming decades.

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Section: Hidden Sectors Intertwine Particle Physics and Cosmologymentioning

confidence: 99%

Particle Physics and Cosmology Intertwined

Nath

2024

Entropy

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“…The 21 cm brightness temperature is also dependent on the optical depth, the spin temperature, and the CMB temperature (Halder et al 2022),…”

Section: General Equationsmentioning

confidence: 99%

A New Constraint on the Simulation of the Intergalactic Medium through the Evolution of the Neutral Hydrogen Fraction in the Epoch of Reionization

Hosseini,

Salmasi,

Tabasi

et al. 2023

ApJ

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The thermal history of the intergalactic medium is full of extremely useful data in the field of astrophysics and cosmology. In other words, by examining this environment in different redshifts, the effects of cosmology and astrophysics can be observed side by side. Therefore, simulation is a very powerful tool to reach a suitable model for the intergalactic medium, both in terms of cosmology and astrophysics. In this work, we have simulated the intergalactic medium with the help of the 21cmFAST code and compared the evolution of the neutral hydrogen fraction in different initial conditions. Considerable works have arbitrarily determined many important effective parameters in the thermal history of the intergalactic medium without any constraints, and usually, there is much flexibility in the modeling. Nonetheless, in this work, by focusing on the evolution of the neutral hydrogen fraction in different models and comparing it with observational data, we have eliminated many simulated models and introduced only limited simulation models that could confirm the observations with sufficient accuracy. This issue becomes thoroughly vital from the point of view that in addition to restricting the models through the neutral hydrogen fraction, it can also impose restrictions on the parameters affecting its changes. However, we hope that in future works, by enhancing the observational data and increasing their accuracy, more compatible models with the history of the intergalactic medium can be achieved.

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Primordial black hole constraints with Hawking radiation—A review

Auffinger

2023

Progress in Particle and Nuclear Physics

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Global 21-cm brightness temperature in viscous dark energy models

Cited by 7 publications

References 167 publications

Particle Physics and Cosmology Intertwined

Particle Physics and Cosmology Intertwined

A New Constraint on the Simulation of the Intergalactic Medium through the Evolution of the Neutral Hydrogen Fraction in the Epoch of Reionization

Primordial black hole constraints with Hawking radiation—A review

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