Bekenstein proved that in Einstein's gravity minimally coupled to one (or many) real,
Abelian, Proca field, stationary black holes (BHs) cannot have Proca hair. Drop** …

We prove the nonexistence of massive scalar, vector and tensor hairs outside the surface of
a static and stationary compact reflecting star. Our result is the extension of the no-hair …

We prove a no charged scalar hair theorem for static black holes in de-Sitter spacetime in
the region between the event horizon and the cosmological horizon. The proof does not …

We discuss the field quantization of a free massive Dirac fermion in the two causally
disconnected static patches of the de Sitter spacetime, by using mode functions that are …

Recent years have witnessed a surge of interest of the lensing of the black holes arising
from general as well as other modified theories of gravity due to the experimental data …

Any recipe to grow black hole hair has to circumvent no-hair theorems by violating some of
their assumptions. Recently discovered hairy black hole solutions exist due to the fact that …

We present a new family of exact black hole configurations, which is a solution to a
generalized Einstein-Maxwell-Dilaton setup in arbitrary dimension. These solutions are …

It was shown a few years back that for a stationary regular black hole or star solution in the
Brans-Dicke theory with a positive cosmological constant Λ, endowed with a de Sitter or …

In this paper, we show a no-go theorem for static spherically symmetric black holes with
vector hair in Einstein-Λ-Vector-Tensor-Gauss–Bonnet theory where a complex vector field …

We discuss various properties of rotating Killing horizons in generic F (R) theories of gravity
in dimension four for spacetimes endowed with two commuting Killing vector fields …