Zobrazeno 1 - 10
of 23
pro vyhledávání: '"Odintsov, Sergey D."'
We investigate realistic models of compact objects, focusing on neutron and strange stars, composed by dense matter and dark energy in the form of a simple fluid or scalar field interacting with matter. For the dark energy component, we use equations
Externí odkaz:
http://arxiv.org/abs/2307.14862
We investigate the Chandrasekhar mass limit for white dwarfs in various models of $f(R)$ gravity. Two equations of state for stellar matter are used: simple relativistic polytropic equation with polytropic index $n=3$ and the realistic Chandrasekhar
Externí odkaz:
http://arxiv.org/abs/2211.14892
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, namely the $f(R)=R+\alpha R^2$ gravity, and calculate the param
Externí odkaz:
http://arxiv.org/abs/2209.13693
We investigate equilibrium configurations of uniformly rotating neutron stars in $R^2$ gravity with axion scalar field for GM1 equation of state (EoS) for nuclear matter. The mass-radius diagram, mass-central energy density are presented for some fre
Externí odkaz:
http://arxiv.org/abs/2008.11271
We investigated realistic neutron stars in axion $R^{2}$ gravity. The coupling between curvature and axion field $\phi$ is assumed in the simple form $\sim R^2\phi$. For the axion mass in the range $m_{a}\sim 10^{-11}-10^{-10}$ eV the solitonic core
Externí odkaz:
http://arxiv.org/abs/2001.08504
We compare the gravitational collapse of homogeneous perfect fluid with various equations of state in the framework of General Relativity and in $R^2$ gravity. We make our calculations using dimensionless time with characteristic timescale $t_{g}\sim
Externí odkaz:
http://arxiv.org/abs/1812.10441
Autor:
Astashenok, Artyom V.1 (AUTHOR) aastashenok@kantiana.ru, Odintsov, Sergey D.2,3 (AUTHOR) odintsov@ice.cat, Oikonomou, Vasilis K.4 (AUTHOR) voikonomou@gapps.auth.gr
Publikováno v:
Symmetry (20738994). Jun2023, Vol. 15 Issue 6, p1141. 17p.
Akademický článek
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Publikováno v:
Monthly Notices of the Royal Astronomical Society; Nov2020, Vol. 498 Issue 3, p3616-3623, 8p
Publikováno v:
Monthly Notices of the Royal Astronomical Society; 3/21/2020, Vol. 493 Issue 1, p78-86, 9p