3 papers
gr-qc2026
FLRW-Cosmology in Scalar-Vector-Tensor Theories of Gravity
Metin Gürses, Yaghoub Heydarzade
We generalize our previous theorem for FLRW spacetimes within the framework of generic metric gravity theories. In earlier work, we proved that, in the absence of matter fields, th…
gr-qc2025
Generalized Vaidya Spacetime in Cotton and Conformal Killing Theories
Metin Gürses, Yaghoub Heydarzade, Çetin Şentürk
We demonstrate that the non-vacuum field equations of Cotton gravity and Conformal Killing gravity admit a generalized class of Vaidya-type solutions. In particular, beyond the sta…
gr-qc2024
Wave Metrics in the Cotton and Conformal Killing Gravity Theories
Metin Gürses, Yaghoub Heydarzade, Çetin Şentürk
We study wave metrics in the context of Cotton Gravity and Conformal Killing Gravity. First, we consider pp-wave metrics with flat and non-flat wave surfaces and show that they are…