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gr-qc2025
Neutron stars in degenerate higher-order scalar-tensor theories: Axial perturbations
Hamza Boumaza, David Langlois
We study the axial (or odd-parity) perturbations of neutron stars in a one-parameter subclass of Degenerate Higher-Order Scalar-tensor (DHOST) theories. After recalling the equilib…
gr-qc2025
Scalar quasinormal modes of gravastars
Hamza Boumaza
In this work, we present a detailed investigation of gravastars within the framework of scalar-tensor theories, emphasizing both the background and perturbed levels for trivial and…