Neutron stars in generalized f(R) gravity |
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Authors: | Emilio Santos |
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Institution: | 1. Departamento de Física, Universidad de Cantabria, Santander, Spain
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Abstract: | A gravity theory is considered with the Einstein-Hilbert Lagrangean R+aR 2+bR μν R μν , R μν being Ricci’s tensor and R the curvature scalar. The parameters a and b are taken of order 1 km2. Arguments are given which suggest that the effective theory so obtained might be a fair approximation of a viable theory. A numerical integration is performed of the field equations for a free neutron gas. The result is that the star mass increases with increasing central density until about 1 solar mass and then decreases. The baryon number increases monotonically, which suggests that the theory allows stars in equilibrium with arbitrary baryon number, no matter how large. |
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