Confronting strange stars with compact-star observations and new physics

S Yang, C Pi, X Zheng, F Weber - Universe, 2023 - mdpi.com
Strange stars ought to exist in the universe according to the strange quark matter hypothesis,
which states that matter made of roughly equal numbers of up, down, and strange quarks …

Rp attractors static neutron star phenomenology

VK Oikonomou - Monthly Notices of the Royal Astronomical …, 2023 - academic.oup.com
In this work, we study the neutron star phenomenology of R p attractor theories in the
Einstein frame. The Einstein frame R p attractor theories have the attractor property that they …

Inflationary attractors predictions for static neutron stars in the mass-gap region

SD Odintsov, VK Oikonomou - Physical Review D, 2023 - APS
In this work we study static neutron stars in the context of several inflationary models which
are popular in cosmology. These inflationary models are nonminimally coupled scalar …

Charged quark stars in f (R, T) gravity

JMZ Pretel, T Tangphati, A Banerjee… - Chinese Physics …, 2022 - iopscience.iop.org
Recent advances in nuclear theory and new astrophysical observations have led to the
need for specific theoretical models applicable to dense-matter physics phenomena …

Anisotropic quark stars in f (R)= R 1+ ϵ gravity

JMZ Pretel, SB Duarte - Classical and Quantum Gravity, 2022 - iopscience.iop.org
Within the metric formalism of f (R) theories of gravity, where R is the Ricci scalar, we study
the hydrostatic equilibrium structure of compact stars with the inclusion of anisotropic …

Chandrasekhar mass limit of white dwarfs in modified gravity

AV Astashenok, SD Odintsov, VK Oikonomou - Symmetry, 2023 - mdpi.com
We investigate the Chandrasekhar mass limit of white dwarfs in various models of f (R)
gravity. Two equations of state for stellar matter are used: the simple relativistic polytropic …

Maximal masses of white dwarfs for polytropes in gravity and theoretical constraints

AV Astashenok, SD Odintsov, VK Oikonomou - Physical Review D, 2022 - APS
We examine the Chandrasekhar limit for white dwarfs in f (R) gravity, with a simple polytropic
equation of state describing stellar matter. We use the most popular f (R) gravity model …

The mass–radius relation for quark stars in energy–momentum squared gravity

T Tangphati, I Karar, A Banerjee, A Pradhan - Annals of Physics, 2022 - Elsevier
We study the structure of quark stars (QSs) adopting homogeneously confined matter inside
the star with a 3-flavor neutral charge and a fixed strange quark mass m s. We explore the …

The criteria of the anisotropic quark star models in Rastall gravity

T Tangphati, A Banerjee, S Hansraj, A Pradhan - Annals of Physics, 2023 - Elsevier
Quark stars are terrestrial laboratories to study fundamental physics at ultrahigh densities
and temperatures. In this work, we investigate the internal structure and the physical …

Strange quark star models from Rastall gravity

A Banerjee, T Tangphati, S Hansraj, A Pradhan - Annals of Physics, 2023 - Elsevier
We study the possible existence of strange matter in the interior of compact stars in Rastall
gravity. The main feature of the Rastall gravity is the covariant derivative of the energy …