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gr-qc2024
Phenomenology of Axionic Static Neutron Stars with Masses in the Mass-Gap Region
V. K. Oikonomou
In this work we consider an axionic scalar-tensor theory of gravity and its effects on static neutron stars. The axionic theory is considered in the regime in which the axion oscil…
gr-qc2024
Red or Blue Tensor Spectrum from GW170817-compatible Einstein-Gauss-Bonnet Theory: A Detailed Analysis
V. K. Oikonomou, Pyotr Tsyba, Olga Razina
In this work we shall prove that the tensor spectral index of the primordial tensor perturbations for GW170817-compatible Einstein-Gauss-Bonnet theories, takes the approximate simp…