Observations have found black holes spanning 10 orders of magnitude in mass across most
of cosmic history. The Kerr black hole solution is, however, provisional as its behavior at …

We review spherical and inhomogeneous analytic solutions of the field equations of Einstein
and of scalar–tensor gravity, including Brans–Dicke theory, non-minimally (possibly …

The assembly of stellar and supermassive black hole (SMBH) mass in elliptical galaxies
since z∼ 1 can help to diagnose the origins of locally observed correlations between SMBH …

Globular clusters are among the oldest stellar populations in the Milky Way; consequently,
they also host some of the oldest known stellar-mass black holes, providing insight into …

From the microscopic point of view, realistic black holes are time-dependent and the
teleological concept of the event horizon fails. At present, the apparent or trapping horizon …

It was recently suggested that" cosmologically coupled" black holes with masses that
increase in proportion to the volume of the Universe might constitute the physical basis of …

We present a theorem which allows one to recognize and classify the asymptotic behavior
and causal structure of McVittie metrics for different choices of scale factor, establishing …

We construct a scalar polynomial curvature invariant that transforms covariantly under a
conformal transformation from any spherically symmetric metric. This invariant has the …

A bstract We study evolution and thermodynamics of a slow-roll transition between early and
late time de Sitter phases, both in the homogeneous case and in the presence of a black …

A class of nonstationary spacetimes is obtained by means of a conformal transformation of
the Schwarzschild metric, where the conformal factor a (t) is an arbitrary function of the time …