Quintessence behaviour dark energy models in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si14.svg" display="inline" id="d1e2248"><mml:mrow><mml:mi>f</mml:mi><mml:mrow><mml:mo>(</mml:mo><mml:mi>Q</mml:mi><mml:mo>,</mml:mo><mml:mi>B</mml:mi><mml:mo>)</mml:mo></mml:mrow></mml:mrow></mml:math>-gravity theory with observational constraints

Maurya, D.C.

doi:10.1016/j.ascom.2024.100798

Astronomy and Computing

2024

DOI: 10.1016/j.ascom.2024.100798

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Quintessence behaviour dark energy models in f(Q,B)-gravity theory with observational constraints

D.C. Maurya

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2024

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Cited by 3 publications

References 66 publications

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Transit Cosmological Models in Non-Coincident Gauge Formulation of $$\boldsymbol{f(Q,C)}$$ Gravity Theory with Observational Constraints

Chandra Maurya

2024

Gravit. Cosmol.

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Transit Cosmological Models in Non-Coincident Gauge Formulation of $$\boldsymbol{f(Q,C)}$$ Gravity Theory with Observational Constraints

Chandra Maurya

2024

Gravit. Cosmol.

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Black holes and regular black holes in coincident $$f({\mathbb {Q}},{\mathbb {B}}_Q)$$ gravity coupled to nonlinear electrodynamics

Junior,

Lobo,

Rodrigues

2024

Eur. Phys. J. C

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In this work, we consider an extension of the symmetric teleparallel equivalent of General Relativity (STEGR), namely, $$f({\mathbb {Q}})$$ f ( Q ) gravity, by including a boundary term $${\mathbb {B}}_Q$$ B Q , where $${\mathbb {Q}}$$ Q is the non-metricity scalar. More specifically, we explore static and spherically symmetric black hole and regular black hole solutions in $$f({\mathbb {Q}},{\mathbb {B}}_Q)$$ f ( Q , B Q ) gravity coupled to nonlinear electrodynamics (NLED). In particular, to obtain black hole solutions, and in order to ensure that our solutions preserve Lorentz symmetry, we assume the following relation $$f_Q = -f_B$$ f Q = - f B , where $$f_{Q}=\partial f/\partial {\mathbb {Q}}$$ f Q = ∂ f / ∂ Q and $$f_{B}= \partial f/\partial {\mathbb {B}}_Q$$ f B = ∂ f / ∂ B Q . We develop three models of black holes, and as the starting point for each case we consider the non-metricity scalar or the boundary term in such a way to obtain the metric functions A(r). Additionally, we are able to express matter through analytical solutions for specific NLED Lagrangians $${{\mathcal {L}}}_{\textrm{NLED}}(F)$$ L NLED ( F ) . Furthermore, we also obtain generalized solutions of the Bardeen and Culetu types of regular black holes, by imposing specific metric functions.

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Modified f(Q,C) gravity dark energy models with observational constraints

Maurya

2024

Mod. Phys. Lett. A

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We investigate an isotropic and homogeneous flat dark energy model in [Formula: see text] gravity theory that is linear in non-metricity Q and quadratic in boundary term C as [Formula: see text], where [Formula: see text] is a model parameter. We have solved the field equations in flat Friedmann–Lemaitre–Robertson–Walker (FLRW) spacetime geometry and considered a relation in the form of Hubble function in total energy density parameters [Formula: see text], [Formula: see text], and Hubble constant [Formula: see text]. We have compared our results with two observational datasets [Formula: see text] and Pantheon SNe Ia datasets by using MCMC analysis and have obtained the best fit present values of parameters. We have used these best fit values throughout in result analysis and discussion. We have found the equation of state (EoS) parameter as [Formula: see text] over [Formula: see text]. We have also investigated the Om diagnostic function and present age of the universe for these two datasets.

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Quintessence behaviour dark energy models in f(Q,B)-gravity theory with observational constraints

Cited by 3 publications

References 66 publications

Transit Cosmological Models in Non-Coincident Gauge Formulation of $$\boldsymbol{f(Q,C)}$$ Gravity Theory with Observational Constraints

Transit Cosmological Models in Non-Coincident Gauge Formulation of $$\boldsymbol{f(Q,C)}$$ Gravity Theory with Observational Constraints

Black holes and regular black holes in coincident $$f({\mathbb {Q}},{\mathbb {B}}_Q)$$ gravity coupled to nonlinear electrodynamics

Modified f(Q,C) gravity dark energy models with observational constraints

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