Further stable neutron star models from f(R) gravity

Abstract

Neutron star models in perturbative $f(R)$ gravity are considered with realistic equations of state. In particular, we consider the FPS, SLy and other equations of state and a case of piecewise equation of state for stars with quark cores. The mass-radius relations for $f(R)=R+R(e^{-R/R_0}-1)$ model and for $R^2$ models with logarithmic and cubic corrections are obtained. In the case of $R^2$ gravity with cubic corrections, we obtain that at high central densities ($\rho >10{\rho }_{ns}$, where ${\rho }_{ns}=2.7\times 10^{14}$ g/cm${}^3$ is the nuclear saturation density), stable star configurations exist. The minimal radius of such stars is close to $9$ km with maximal mass $\sim 1.9M_{\odot }$ (SLy equation). A similar situation takes place for AP4 and BSK20 EoS. Such an effect can give rise to more compact stars than in General Relativity. If observationally identified, such objects could constitute a formidable signature for modified gravity at astrophysical level. Another interesting result can be achieved in modified gravity with only a cubic correction. For some EoS, the upper limit of neutron star mass increases and therefore these EoS can describe realistic star configurations (although, in General Relativity, these EoS are excluded by observational constraints).

18 pages, 17 figures, revised version significally expanded, to appear in JCAP

References in corpus (17)

• Shapiro delay measurement of a two solar mass neutron star
• A Massive Pulsar in a Compact Relativistic Binary
• Class of viable modified $f(R)$ gravities describing inflation and the onset of accelerated expansion
• The relativistic pulsar-white dwarf binary PSR J1738+0333 II. The most stringent test of scalar-tensor gravity
• Astrophysical Measurement of the Equation of State of Neutron Star Matter
• Future of the universe in modified gravitational theories: Approaching to the finite-time future singularity
• The Mass and Radius of the Neutron Star in 4U 1820-30
• Hydrostatic equilibrium and stellar structure in f(R)-gravity
• Analytical representations of unified equations of state for neutron-star matter
• Phantom scalar dark energy as modified gravity: understanding the origin of the Big Rip singularity
• Non-singular exponential gravity: a simple theory for early- and late-time accelerated expansion
• Relativistic stars in f(R) gravity, and absence thereof
• Cosmological evolution in exponential gravity
• Time-dependent matter instability and star singularity in $F(R)$ gravity
• The existence of relativistic stars in f(R) gravity
• Tracking quintessence by cosmic shear - Constraints from VIRMOS-Descart and CFHTLS and future prospects
• Observational Constraints on Exponential Gravity

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