The dark sector cosmology

Abdalla, Élcio; Marins, Alessandro

doi:10.1142/s0218271820300141

Cited by 16 publications

(14 citation statements)

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“…We note that the nature of interaction function Q is unknown and there is not a unique theoretical model which describes its origin [36][37][38][39]. In terms of phenomenology, there are various approaches in the literature which have shown that a nonzero function Q is supported by the cosmological observations [40][41][42][43][44][45][46][47].…”

Section: Interacting Dark Energymentioning

confidence: 99%

“…The latter system has been the case of study of various analysis in the literature [49][50][51][52][53][54][55][56][57][58][59][60] where Q = Q (ρ m , ρ d ) has been assumed to be either a linear function [46][47][48][49][61][62][63][64][65][66] and many others. Additionally, with the above choices for the coupling function, various functional forms of the scalar field potential function V (φ) can also be chosen [33,35,[50][51][52]60,[67][68][69][70][71][72].…”

Section: Interacting Dark Energymentioning

confidence: 99%

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Interacting quintessence in light of generalized uncertainty principle: cosmological perturbations and dynamics

et al. 2021

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We consider a cosmological scenario endowed with an interaction between the universe’s dark components – dark matter and dark energy. Specifically, we assume the dark matter component to be a pressure-less fluid, while the dark energy component is a quintessence scalar field with Lagrangian function modified by the quadratic Generalized Uncertainty Principle. The latter modification introduces new higher-order terms of fourth-derivative due to quantum corrections in the scalar field’s equation of motion. Then, we investigate asymptotic dynamics and general behaviour of solutions of the field equations for some interacting models of special interests in the literature. At the background level, the present interacting model exhibits the matter-dominated and de Sitter solutions which are absent in the corresponding quintessence model. Furthermore, to boost the background analysis, we study cosmological linear perturbations in the Newtonian gauge where we show how perturbations are modified by quantum corrected terms from the quadratic Generalized Uncertainty Principle. Depending on the coupling parameters, scalar perturbations show a wide range of behavior.

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Section: Interacting Dark Energymentioning

confidence: 99%

Section: Interacting Dark Energymentioning

confidence: 99%

Interacting quintessence in light of generalized uncertainty principle: cosmological perturbations and dynamics

et al. 2021

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“…We note that the nature of interaction function Q is unknown and there is not a unique theoretical model which describes its origin [30][31][32]45]. In terms of phenomenology, there are various approaches in the literature which have shown that a nonzero function Q is supported by the cosmological observations [37][38][39][40][41][42][43][44].…”

Section: Interacting Dark Energymentioning

confidence: 99%

Interacting quintessence in light of Generalized Uncertainty Principle: Cosmological perturbations and dynamics

Paliathanasis,

Leon,

Khyllep

et al. 2021

Preprint

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We consider a cosmological scenario endowed with an interaction between the universe's dark components − dark matter and dark energy. Specifically, we assume the dark matter component to be a pressureless fluid, while the dark energy component is a quintessence scalar field with Lagrangian function modified by the quadratic Generalized Uncertainty Principle. The latter modification introduces new higher-order terms of fourth-derivative due to quantum corrections in the scalar field's equation of motion. We then investigate asymptotic dynamics and general behaviour of solutions of the field equations for some interacting models of special interests in the literature. At the background level, the present interacting model exhibits the matter-dominated and de Sitter solutions which are absent in the corresponding quintessence model. Furthermore, to boost background analysis, we study cosmological linear perturbations in the Newtonian gauge where we show how perturbations are modified by quantum corrections terms from the quadratic Generalized Uncertainty Principle. Depending on the coupling parameters, scalar perturbations show a wide range of behavior.

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“…In recent years new observational results have provided insight into various aspects of general relativity (GR) and cosmology, especially concerning the astonishing contribution provided by dark matter (DM) and dark energy (DE) to the total energy budget of the Universe, contributions that form an overwhelming majority of the mass of the Universe (see, e.g., Abdalla & Marins 2020). Therefore, it is expected that a new physical picture will emerge once more is found about the structure of the dark sector (Abdalla et al 2010;Wang et al 2007Wang et al , 2016.…”

Section: Introductionmentioning

confidence: 99%

The BINGO project

Abdalla¹,

Ferreira²,

Landim³

et al. 2022

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Context. Observations of the redshifted 21-cm line of neutral hydrogen (Hi) are a new and powerful window of observation that offers us the possibility to map the spatial distribution of cosmic Hi and learn about cosmology. Baryon Acoustic Oscillations from Integrated Neutral Gas Observations (BINGO) is a new unique radio telescope designed to be one of the first to probe baryon acoustic oscillations (BAO) at radio frequencies.Aims. BINGO has two science goals: cosmology and astrophysics. Cosmology is the main science goal and the driver for BINGO's design and strategy. The key of BINGO is to detect the low redshift BAO to put strong constraints on the dark sector models and test the ΛCDM (cold dark matter) model. Given the versatility of the BINGO telescope, a secondary goal is astrophysics, where BINGO can help discover and study fast radio bursts (FRB) and other transients, as well as study Galactic and extragalactic science. In this paper, we introduce the latest progress of the BINGO project, its science goals, describing the scientific potential of the project for each goal and the new developments obtained by the collaboration. Methods. BINGO is a single dish transit telescope that will measure the BAO at low-z by making a 3D map of the Hi distribution through the technique of intensity mapping over a large area of the sky. In order to achieve the project's goals, a science strategy and a specific pipeline for cleaning and analyzing the produced maps and mock maps was developed by the BINGO team, which we generally summarize here. Results. We introduce the BINGO project and its science goals and give a general summary of recent developments in construction, science potential, and pipeline development obtained by the BINGO collaboration in the past few years. We show that BINGO will be able to obtain competitive constraints for the dark sector. It also has the potential to discover several FRBs in the southern hemisphere. The capacity of BINGO in obtaining information from 21-cm is also tested in the pipeline introduced here. Following these developments, the construction and observational strategies of BINGO have been defined. Conclusions. There is still no measurement of the BAO in radio, and studying cosmology in this new window of observations is one of the most promising advances in the field. The BINGO project is a radio telescope that has the goal to be one of the first to perform this measurement and it is currently being built in the northeast of Brazil. This paper is the first of a series of papers that describe in detail each part of the development of the BINGO project.

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The dark sector cosmology

Cited by 16 publications

References 40 publications

Interacting quintessence in light of generalized uncertainty principle: cosmological perturbations and dynamics

Interacting quintessence in light of generalized uncertainty principle: cosmological perturbations and dynamics

Interacting quintessence in light of Generalized Uncertainty Principle: Cosmological perturbations and dynamics

The BINGO project

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