Abstract The links between the deformation parameter $$\beta $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>β</mml:mi></mml:math> of generalized uncertainty principle (GUP) to two free parameters $$\hat{\omega }$$ xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mover><mml:mi>ω</mml:mi><mml:mo>^</mml:mo></mml:mover></mml:math> and $$\gamma xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>γ</mml:mi></mml:math> running Newtonian coupling constant Asymptotic Safe...

Abstract By considering the concept of modified Chaplygin gas (MCG) as a single fluid model unifying dark energy and matter, we construct static, spherically charged black hole (BH) solution in framework General Relativity. The P – V criticality anti-de Sitter (AdS) BH with surrounding MCG is explored context extended phase space, where negative cosmological constant operates thermodynamical pressure. This critical behavior shows that small/large transition analogous to van der Waals...

Abstract We have obtained the Generalized Uncertainty Principle (GUP) corrected de Sitter and anti-de black hole solutions in bumblebee gravity with a topological defect. calculated scalar, electromagnetic gravitational quasinormal modes for both vanishing non-vanishing effective cosmological constant using Padé averaged sixth order WKB approximation method. Apart from this, time evolutions all three perturbations are studied, domain profile. found that first second GUP parameters α β ,...

On the basis of homogeneous and isotropic Friedmann-Lemaitre-Robertson-Walker (FLRW) geometry, solutions to issues cosmic acceleration dark energy are being put forth within context $f\left( Q\right)$ gravity. We take into account a power law $f(Q)$ model using Q\right) =\alpha Q^{n}$, where $\alpha $ $n$ free parameters. In current scenario, we may establish density pressure for our by applying constant sound speed parameterizations, i.e., $\vartheta_{s}^{2}=\beta$, barotropic fluid is...

Abstract In this work, we have studied the quasinormal modes of a black hole in model type $$f(Q)=\underset{n}{\sum }a_{n}\left( Q-Q_{0}\right) ^{n} $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>f</mml:mi> <mml:mo>(</mml:mo> <mml:mi>Q</mml:mi> <mml:mo>)</mml:mo> </mml:mrow> <mml:mo>=</mml:mo> <mml:munder> <mml:mo>∑</mml:mo> <mml:mi>n</mml:mi> </mml:munder> <mml:msub> <mml:mi>a</mml:mi> </mml:msub> <mml:msup> <mml:mfenced> <mml:mo>-</mml:mo>...

Abstract We study the tideless traversable wormholes in f ( R ) gravity metric formalism. First we consider three shape functions of and their viabilities structures. The connection between model wormhole function has been studied dependency with is shown. also obtain a solution Starobinsky surrounded by cloud strings. In this case, depends on both parameter strings parameter. structure height highly affected parameter, while it less sensitive to energy conditions have found ranges null...

Abstract This paper deals with the thermodynamics, Joule‐Thomson expansion and optical behaviour of a Reissner‐Nordström‐anti‐de Sitter black hole in Rastall gravity surrounded by quintessence field. The solution obtained this framework is different from corresponding General Relativity. metric function, as well Hawking temperature, affected presence energy‐momentum conservation violation. violation also affects isenthalpic inversion temperature curves, an increase parameter, rises slowly....

Abstract In this work, the quasinormal mode, greybody factors, and absorption cross section of de Sitter Reissner‐Nordström black hole surrounded by quintessence field in Rastall gravity are studied. The violation energy‐momentum conservation has a non‐linear effect on modes. With an increase charge, both real parts modes i.e. oscillation frequency ring‐down Gravitational Waves (GWs) damping or decay rate GWs non‐linearly. A similar observation is made for structural parameter also, however...

Abstract In this paper, we have introduced a new f ( R ) gravity model as an attempt to with more parametric control, so that the can be used explain existing problems well explore directions in physics of gravity, by properly constraining it recent observational data. Here basic aim is study properties Gravitational Waves (GWs) model. metric formalism, shows existence scalar degree freedom like other models. Due reason, there mode polarization GWs present theory. This exists mixed state,...

We obtain the black hole solution for Ayón - Beato García (ABG) type surrounded by a cloud of strings in Rastall gravity and calculate scalar quasinormal modes it massless field. To have better visualization results, we also introduce new non-linear electrodynamic source gravity. see that are affected sources case higher magnitudes charge $q$. With increase magnitude $q$, gravitational waves decay rapidly solution, while ABG hole, rate increases initially finally starts to decrease near...

In this paper, we propose a new parametrization of dark energy based on the $Om(z)$ diagnostic tool behavior. For purpose, investigate functional form that predicts popular dynamical models, namely phantom and quintessence. We also found famous cosmological constant for specified values model's parameters. employed Markov Chain Monte Carlo approach to constrain model using Hubble, Pantheon samples, BAO datasets. Finally, used observational constraints characteristics evolution compare our...

We investigate some properties of a black hole in Horndeski gravity theory mimicking Einstein-Gauss-Bonnet (EGB) at $D \rightarrow 4$. Borrowing ideas from quasitopological gravities provide matter source dyonic fields, which the solution carries two charges, electric and magnetic, context EGB gravity. However, due to several limitations 4$, we consider can mimic The essential practice used this paper is electromagnetic quasinormal modes process, with goal discovering spectrum such an...

Abstract This work deals with scalar quasinormal modes using the higher-order WKB method and black hole shadow in non-minimal Einstein–Yang–Mills theory. To validate results of modes, time domain profiles are also investigated. We find that an increase magnetic charge hole, ringdown gravitational wave increases non-linearly damping rate decreases non-linearly. The presence a non-linear decrease shadow. For large values coupling parameter, becomes soliton solution corresponding frequency...

One of the most favourable extensions General Relativity is $f(R)$ gravity. gravity in Palatini formalism can be a realistic alternative to dark energy problem. In this work we study recently introduced model along with two other models cosmological perspectives under formalism. First, cosmic expansion history these help important cosmographic parameters, such as Hubble parameter, luminosity distance, effective equation state etc. This shows that new behaves similarly well $\Lambda$CDM some...

Abstract The compact stars are promising candidates associated with the generation of gravitational waves (GWs). In this work, we study a special type known as strange in f (ℛ) gravity Palatini formalism. Here consider three models viz., Starobinsky, Hu-Sawicki and Gogoi-Goswami domain MIT Bag model linear equations state (EoSs). We compute stellar structures numerically constrained parameters set probable star candidates. shows that consideration stiffer EoSs within favourable may result...

We study the Quasinormal Modes (QNMs) of Schwarzschild black hole surrounded by a quintessence field after implementing quantum corrections to its solution as required Generalized Uncertainty Principle (GUP). analyze dependence QNMs on deformation parameters GUP well parameter. In most cases show appreciable dependency these parameters. For better idea accuracy calculations QNMs, we compare results obtained via Mashhoon method with sixth-order Wentzel–Kramers–Brillouin method. A good...

This research paper presents a black hole solution with rational non-linear electrodynamics source in the Rastall gravity framework. The analyzes thermodynamic properties of normal phase space and explores its critical behavior. structure is examined using extended first law thermodynamics, cosmological constant $\Lambda$ serving as pressure $P$. isotherms exhibit van der Waals behavior at small values horizon $r_+$. also investigates Gibbs free energy finds two points pressures where...