6 papers
Neutron stars with primary scalar hair
Hamza Boumaza, Christos Charmousis, David Langlois +1
We investigate static and spherically symmetric neutron star solutions endowed with primary scalar hair in a subfamily of Degenerate-Higher-Order-Scalar-Tensor (DHOST) theories of…
Radial Oscillations of Neutron Stars with Vector-Induced Scalar Hair
Hamza Boumaza
In this paper, we investigate the equilibrium configurations and radial perturbations of neutron stars within a subclass of gauge-invariant Scalar-Vector-Tensor (SVT) theories. By…
Axial Quasi-normal Modes of Admixed Neutron Stars
Hamza Boumaza, Boris Betancourt Kamenetskaia
We study axial quasi-normal modes of admixed neutron stars composed of ordinary nuclear matter and a self-interacting bosonic dark matter component. The equilibrium configurations…
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…
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…
Neutron Stars in Scalar Torsion Theories with Nonminimal Coupling
Youcef Kehal, Khireddine Nouicer, Hamza Boumaza
We study the existence and structure of static and slowly rotating neutron stars (NSs) in a particular truncation of scalar torsion theory with a scalar field non-minimally c…