Compact objects occupy a pivotal role in the exploration of Nature. The interest spans from
the role of compact objects in astrophysics to their detection through various methods …

Scalarization is a mechanism that endows strongly self-gravitating bodies, such as neutron
stars and black holes, with a scalar-field configuration. It resembles a phase transition in that …

Ultracompact objects with light rings (LRs) but without an event horizon could mimic black
holes (BHs) in their strong gravity phenomenology. But are such objects dynamically viable …

We show that self-interacting vector field theories exhibit unphysical behavior even when
they are not coupled to any external field. This means any theory featuring such vectors is in …

Interacting massive spin-1 fields have been widely used in cosmology and particle physics.
We obtain a new condition on the validity of the classical limit of these theories related to the …

Exploring the nature of gravity in the strong curvature regime is seeing a surge of interest
lately. This is expected to intensify, as it is driven by current and future observations of …

Abstract We consider a Proca-Higgs model wherein a complex vector field gains mass via
spontaneous symmetry breaking, by coupling to a real scalar field with a Higgs-type …

A bstract We study the scenario of dark photon Dark Matter where the mass is generated
through the Higgs mechanism rather than the constant Stueckelberg mass. In this …

Recently, spherical and static flat space solitons (balls) and self-gravitating, everywhere
regular, asymptotically flat solitons (stars) were constructed in an Einstein-Proca-Higgs …

LISA, the Laser Interferometer Space Antenna, will usher in a new era in gravitational-wave
astronomy. As the first anticipated space-based gravitational-wave detector, it will expand …