Nonlinear evolution of anisotropic matter configurations under higher-order curvature corrections

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27740%2F25%3A10259592" target="_blank" >RIV/61989100:27740/25:10259592 - isvavai.cz</a>

Výsledek na webu

<a href="https://link.springer.com/article/10.1140/epjc/s10052-025-15061-5" target="_blank" >https://link.springer.com/article/10.1140/epjc/s10052-025-15061-5</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1140/epjc/s10052-025-15061-5" target="_blank" >10.1140/epjc/s10052-025-15061-5</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Nonlinear evolution of anisotropic matter configurations under higher-order curvature corrections

Popis výsledku v původním jazyce

This study examines the dynamical evolution of self-gravitating systems in the presence of exotic matter within the framework of f(R) gravity. Specifically, we have adopted the Starobinsky model f (R) = R + alpha R-2, which incorporates higher-order curvature corrections to describe nonlinear gravitational behavior. The analysis focuses on the nonlinear spherical evolution of anisotropic matter configurations and explains how dark matter influences their physical characteristics. The presence of dark matter is found to significantly affect the radial and tangential pressure distributions, thereby altering the overall dynamics of the system. The model is employed for compact object Her X-1 described by the generalized Tolman-Kuchowicz metric, demonstrating a singularity-free behavior of the physical parameters. The results reveal that increasing the parameter n of the generalized Tolman-Kuchowicz metric leads to striking variations in the model characteristics, highlighting its essential role in governing internal structure and evolution of the compact object. The model remains physically viable under different testing criteria like energy conditions, hydrostatic equilibrium condition, adiabatic index, causality conditions, Herrera&apos;s Cracking condition and mass-radius relation presented in this work.

Název v anglickém jazyce

Nonlinear evolution of anisotropic matter configurations under higher-order curvature corrections

Popis výsledku anglicky

This study examines the dynamical evolution of self-gravitating systems in the presence of exotic matter within the framework of f(R) gravity. Specifically, we have adopted the Starobinsky model f (R) = R + alpha R-2, which incorporates higher-order curvature corrections to describe nonlinear gravitational behavior. The analysis focuses on the nonlinear spherical evolution of anisotropic matter configurations and explains how dark matter influences their physical characteristics. The presence of dark matter is found to significantly affect the radial and tangential pressure distributions, thereby altering the overall dynamics of the system. The model is employed for compact object Her X-1 described by the generalized Tolman-Kuchowicz metric, demonstrating a singularity-free behavior of the physical parameters. The results reveal that increasing the parameter n of the generalized Tolman-Kuchowicz metric leads to striking variations in the model characteristics, highlighting its essential role in governing internal structure and evolution of the compact object. The model remains physically viable under different testing criteria like energy conditions, hydrostatic equilibrium condition, adiabatic index, causality conditions, Herrera&apos;s Cracking condition and mass-radius relation presented in this work.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10100 - Mathematics

Projekt

<a href="/cs/project/EH23_021%2F0008759" target="_blank" >EH23_021/0008759: Zvýšení odolnosti energetických sítí v kontextu dekarbonizace, decentralizace a udržitelného socioekonomického rozvoje</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

European Physical Journal C

ISSN

1434-6044

e-ISSN

1434-6052

Svazek periodika

85

Číslo periodika v rámci svazku

11

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

14

Strana od-do

1310

Kód UT WoS článku

001616736200004

EID výsledku v databázi Scopus

2-s2.0-105021974340