742 citations · 2.4k across the 58 of their papers we have counts for
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Temperature effects on white dwarfs in modified gravity
Sofía Vidal, Aneta Wojnar, Laur Järv
In this article we analyze the effects of a finite temperature equation of state on the equilibrium structure of white dwarfs in massive Brans-Dicke theory as well as the symmetron…
Einstein crystals in Snyder and Snyder-de Sitter noncommutative backgrounds
Anna Pachoł, Aneta Wojnar
We investigate the behavior of Einstein crystals in noncommutative backgrounds described by the Snyder and Snyder-de Sitter models. Possible novel effects, which may arise in reali…
When waves meet rays: Seismic vibrations and cosmic showers to test gravity
Aneta Wojnar
We propose a novel laboratory test of gravity combining seismic-wave measurements with cosmic-ray muon detections. Quantum-gravity corrections to the anharmonic Debye model are der…
The effects of strong gravity on the dispersion relation of massive particles in the Kaluza-Klein theory
Anna Horváth, Aneta Wojnar, Gergely Gábor Barnaföldi
We derive a modified dispersion relation for massive particles within the frameworks of five-dimensional Kaluza-Klein theory and general relativity, taking into account strong grav…
Testing gravity with the latent heat of neutron star matter
Pablo Navarro Moreno, Aneta Wojnar, Felipe J. Llanes-Estrada
The Seidov limit is a bound on the maximum latent heat that a presumed first-order phase transition of neutron-star matter can have before its excess energy density, not compensate…
Crystallized white dwarf stars in scalar-tensor gravity
Sofía Vidal, Aneta Wojnar, Laur Järv +1
We study the effects of massive scalar-tensor theories on the internal properties, crystallization, and cooling process of white dwarf stars that might potentially solve observatio…
Foliation-generating observers under Lorentz transformations
Daniel Blixt, Alejandro Jiménez Cano, Aneta Wojnar
In this work, we revise the concept of foliation and related aspects that are crucial when formulating the Hamiltonian evolution for various theories beyond General Relativity. In…
Bose and Fermi gases in metric-affine gravity and linear Generalized Uncertainty Principle
Aneta Wojnar, Débora Aguiar Gomes
We examine the relationship between Palatini-like theories of gravity and models incorporating linear generalized uncertainty principles. Additionally, we delve into the thermodyna…
Twin Stars in General Relativity and Extended Theories of Gravity
Eva Lope-Oter, Aneta Wojnar
We explore gravity-independent equations of state for neutron stars, particularly focusing on twin stars. Examining four categories, we emphasize their behavior in both General Rel…
A covariant tapestry of linear GUP, metric-affine gravity, their Poincaré algebra and entropy bound
Ahmed Farag Ali, Aneta Wojnar
Motivated by the potential connection between metric-affine gravity and linear Generalized Uncertainty Principle (GUP) in the phase space, we develop a covariant form of linear GUP…
Bose-Einstein Condensate and Liquid Helium He: Implications of GUP and Modified Gravity Correspondence
Aneta Wojnar
Utilizing the recently established connection between Palatini-like gravity and linear Generalized Uncertainty Principle (GUP) models, we have formulated an approach that facilitat…
Unveiling Phase Space Modifications: A Clash of Modified Gravity and the Generalized Uncertainty Principle
Aneta Wojnar
This study explores the link between Modified Gravity and modifications of phase space volume. Analyzing Fermi gas modifications {in the non-relativistic limit of the} Ricci-based…
Propagation and lensing of gravitational waves in Palatini gravity
Sreekanth Harikumar, Laur Järv, Margus Saal +2
Accelerated expansion of the Universe prompted searches of modified gravity theory beyond general relativity, instead of adding a mysterious dark energy component with exotic physi…
Introduction to stellar and substellar physics in modified gravity
Aneta Wojnar
We discuss the standard Lane-Emden formalism as well as the one related to the slowly rotating objects. It is preceded by a brief introduction of different forms of the polytropic…
Cosmological constraints of Palatini gravity
Débora Aguiar Gomes, Rebecca Briffa, Aleksander Kozak +3
In this study, we investigate a Palatini gravity model featuring a quadratic term correction, aligning it with the most recent expansion rate data, with a particular focus o…
Earthquakes as probing tools for gravity theories
Aleksander Kozak, Aneta Wojnar
We propose a novel method for testing gravity models using seismic data from Earth. By imposing observational constraints on Earth's moment of inertia and mass, we rigorously limit…
Constraining Snyder and GUP models with low-mass stars
Anna Pachoł, Aneta Wojnar
We investigate the application of an equation of state that incorporates corrections derived from the Snyder model (and the Generalized Uncertainty Principle) to describe the behav…
Palatini gravity tests in the weak field limit: Solar System, seismology and galaxies
Alejandro Hernandez-Arboleda, Davi C. Rodrigues, Júnior D. Toniato +1
Palatini gravity is probably the simplest extension of general relativity (GR) and the simplest realization of a metric-affine theory. It has the same number of degrees of f…
Constraining Palatini gravity with GR-independent equations of state for neutron stars
Eva Lope-Oter, Aneta Wojnar
We demonstrate how to construct GR-independent equations of state. We emphasize the importance of using theory-based principles instead of relying solely on astrophysical observabl…
Fermi equation of state with finite temperature corrections in quantum space-times approach: Snyder model vs GUP case
Anna Pachoł, Aneta Wojnar
We investigate the impact of the deformed phase space associated with the quantum Snyder space on microphysical systems. The general Fermi-Dirac equation of state and specific corr…
Planetary seismology as a test of modified gravity proposals
Aleksander Kozak, Aneta Wojnar
We demonstrate that it is possible to test models of gravity, such as Palatini and Eddington-inspired Born-Infeld models, using seismic data from Earth. By incorporating add…
Equilibrium of slowly rotating polytropes in modified theories of gravity
Shaswata Chowdhury, Pritam Banerjee, Aneta Wojnar
A general formalism to find the density profile of a slowly rotating stellar object in modified gravity is presented. We derive a generic Lane-Emden equation and its analytical sol…
Metric-affine effects in crystallization processes of white dwarfs
Surajit Kalita, Lupamudra Sarmah, Aneta Wojnar
We analyze the effects of modified gravity on specific heats of electrons and ions, Debye temperature, crystallization process, and cooling mechanism in white dwarfs. We derive the…
Cooling Process of White Dwarf Stars in Palatini Gravity
Surajit Kalita, Lupamudra Sarmah, Aneta Wojnar
A simple cooling model of white dwarf stars is re-analyzed in Palatini gravity. Modified gravity affects the white dwarf structures and consequently their ages. We find that…