Relaxing cosmological tensions with a sign switching cosmological constant: Improved results with Planck, BAO, and Pantheon data
We present a further observational analysis of the Λ s CDM model proposed in Akarsu et
al.[Phys. Rev. D 104, 123512 (2021) PRVDAQ 2470-0010 10.1103/PhysRevD …
al.[Phys. Rev. D 104, 123512 (2021) PRVDAQ 2470-0010 10.1103/PhysRevD …
Cosmological models in scale-independent energy-momentum squared gravity
Ö Akarsu, NM Uzun - Physics of the Dark Universe, 2023 - Elsevier
Scale-independent EMSG is a particular model of energy–momentum squared gravity
(EMSG) in which the new terms in the Einstein field equations arising from the EMSG theory …
(EMSG) in which the new terms in the Einstein field equations arising from the EMSG theory …
Equivalence of matter-type modified gravity theories to general relativity with nonminimal matter interaction
In this study, we first establish that gravity models incorporating matter-related terms, such as
f (L m), f (g μ ν T μ ν), and f (T μ ν T μ ν), into the usual matter Lagrangian density L m, are …
f (L m), f (g μ ν T μ ν), and f (T μ ν T μ ν), into the usual matter Lagrangian density L m, are …
Compartmentalization and coexistence in the dark sector of the universe
We revise the cosmological interaction between dark energy and dark matter. More
precisely, we focus on models that support compartmentalization or coexistence in the dark …
precisely, we focus on models that support compartmentalization or coexistence in the dark …
Relativistic binary systems in scale-independent energy–momentum squared gravity
In this paper, we study the gravitational-wave (GW) radiation and radiative behaviour of
relativistic compact binary systems in the scale-independent energy–momentum squared …
relativistic compact binary systems in the scale-independent energy–momentum squared …
Dynamics of the -body system in energy-momentum squared gravity: Equations of motion to the first post-Newtonian order
E Nazari - Physical Review D, 2024 - APS
In the energy-momentum squared gravity (EMSG), the matter energy-momentum tensor is
not conserved due to nonminimal interaction between the usual and modified matter fields …
not conserved due to nonminimal interaction between the usual and modified matter fields …
4D Einstein–Gauss–Bonnet cosmology with Chameleon mechanism
A Paliathanasis - General Relativity and Gravitation, 2024 - Springer
We explore the impact of the chameleon mechanism in scalar field Einstein–Gauss–Bonnet
gravity on the dynamics of cosmological parameters. Conducting a thorough analysis of the …
gravity on the dynamics of cosmological parameters. Conducting a thorough analysis of the …
Weak field and slow motion limits in energy–momentum powered gravity
We explore the weak field and slow motion limits, Newtonian and Post-Newtonian limits, of
the energy–momentum powered gravity (EMPG), viz., the energy–momentum squared …
the energy–momentum powered gravity (EMPG), viz., the energy–momentum squared …
Cosmological perturbations in the energy-momentum squared gravity theory: constraints from gravitational wave standard sirens and redshift space distortions
QM Fu, X Zhang - arXiv preprint arXiv:2408.01665, 2024 - arxiv.org
We investigate the linear cosmological perturbations in the context of the so-called energy-
momentum squared gravity (EMSG) theory. Recent researches show that the EMSG theory …
momentum squared gravity (EMSG) theory. Recent researches show that the EMSG theory …
Compartmental and Coexistence in the Dark Sector of the Universe
We revise the cosmological interaction between dark energy and dark matter. More
precisely, we focus on models that support compartmentalization or co-existence in the dark …
precisely, we focus on models that support compartmentalization or co-existence in the dark …