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2020

Relativistic stars in 4D Einstein-Gauss-Bonnet gravity

Doneva, Daniela D., Yazadjiev, Stoytcho S.

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In the present paper we investigate the structure of relativistic stars in 4D Einstein-Gauss-Bonnet gravity.

The mass-radius relations are obtained for realistic hadronic and for strange quark star equations of state, and for a wide range of the Gauss-Bonnet coupling parameter $\alpha$.
Even though the deviations from general relativity for nonzero values of $\alpha$ can be large enough, they are still comparable with the variations due to different modern realistic equations of state if we restrict ourselves to moderate value of $\alpha$.
That is why the current observations of the neutron star masses and radii alone can not impose stringent constraints on the value of the parameter $\alpha$.

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