82 citations · 873 across the 60 of their papers we have counts for
26 papers · 1 filter
Evading Cauchy horizon excision in scalarized regular black holes
Ernesto Contreras, Pedro Bargueño, Arthur G. Suvorov
Spontaneous scalarization provides a dynamical mechanism to evade the no-hair paradigm, but it has been argued to generically eliminate the Cauchy horizon in charged black holes. W…
Random walks around black holes and low-frequency X-ray variability
Arthur G. Suvorov
The stochastic dynamics of a grain embedded within a turbulent fluid subject to strong gravitational fields can be formulated as a random walk on a Riemannian manifold. Such curvat…
General Framework for the Spontaneous Scalarization of Regular Black Holes
Ernesto Contreras, Mikaela Carrasco-Hidalgo, Pedro Bargueño +1
We investigate the spontaneous scalarization of generic, static, and spherically symmetric regular black holes supported by nonlinear electrodynamics. Starting from an arbitrary se…
Multipole moments do not uniquely characterize spacetimes beyond general relativity
Arthur G. Suvorov, George Pappas
Spacetimes in general relativity can be uniquely decomposed into a set of multipole moments. Given the usefulness of moments in the categorization of radiation patterns, tidal defo…
Doubly regular black holes
Arthur G. Suvorov, Pedro Bargueño
In addition to curvature singularities, electrovacuum black holes in general relativity exhibit thermodynamic singularities. These so-called Davies' points occur at nonextremal val…
Lensing by black holes within astrophysical environments
Gerasimos Kouniatalis, Arthur G. Suvorov, Kyriakos Destounis
Astrophysical black holes are likely to be surrounded by various forms of matter in the form of disks or halos. While a number of studies have examined the impact of an environment…
Universality of gravitational radiation from magnetar magnetospheres
Arthur G. Suvorov, Petros Stefanou, José A. Pons
The intense magnetic fields inferred from magnetars suggest they may be strong gravitational-wave emitters. Although emissions due to hydromagnetic deformations are more promising…
Geometric distances between closed universes
Arthur G. Suvorov
The large-scale structure of the Universe is well approximated by the Friedmann equations, parametrized by several energy densities which can be observationally inferred. A natural…
Magnetic equilibria of relativistic axisymmetric stars: The impact of flow constants
Arthur G. Suvorov, Kostas Glampedakis
Symmetries and conservation laws associated with the ideal Einstein-Euler system, for stationary and axisymmetric stars, can be utilized to define a set of flow constants. These qu…
Constraining equation of state groups from -mode asteroseismology
Hao-Jui Kuan, Christian J. Krüger, Arthur G. Suvorov +1
Buoyancy-restored modes inside neutron stars depend sensitively on both the microphysical (e.g., composition and entropy gradients) and macrophysical (e.g., stellar mass and radius…
Astrophysics with the Laser Interferometer Space Antenna
Pau Amaro Seoane, Jeff Andrews, Manuel Arca Sedda +156
The Laser Interferometer Space Antenna (LISA) will be a transformative experiment for gravitational wave astronomy, and, as such, it will offer unique opportunities to address many…
Gravitational waves from accretion-induced descalarization in massive scalar-tensor theory
Hao-Jui Kuan, Arthur G. Suvorov, Daniela D. Doneva +1
Many classes of extended scalar-tensor theories predict that dynamical instabilities can take place at high energies, leading to the formation of scalarized neutron stars. Dependin…
General-relativistic treatment of tidal -mode resonances in coalescing binaries of neutron stars. I. Theoretical framework and crust breaking
Hao-Jui Kuan, Arthur G. Suvorov, Kostas D. Kokkotas
During the final stages of a neutron-star binary coalescence, stellar quasi-normal modes can become resonantly excited by tidal fields. If the strain exerted by the excited modes e…
Gravitational-wave glitches in chaotic extreme-mass-ratio inspirals
Kyriakos Destounis, Arthur G. Suvorov, Kostas D. Kokkotas
The Kerr geometry admits the Carter symmetry, which ensures that the geodesic equations are integrable. It is shown that gravitational waveforms associated with extreme-mass-ratio…
Exact theory for the Rezzolla-Zhidenko metric and self-consistent calculation of quasinormal modes
Arthur G. Suvorov, Sebastian H. Völkel
A covariant, scalar-tensor gravity is constructed such that the static, spherically symmetric Rezzolla-Zhidenko metric is an exact solution to the theory. The equations describing…
Testing spacetime symmetry through gravitational waves from extreme-mass-ratio inspirals
Kyriakos Destounis, Arthur G. Suvorov, Kostas D. Kokkotas
One of the primary aims of upcoming space-borne gravitational wave detectors is to measure radiation in the mHz range from extreme-mass-ratio inspirals. Such a detection would plac…
Testing horizon topology with electromagnetic observations
Sourabh Nampalliwar, Arthur G. Suvorov, Kostas D. Kokkotas
In general relativity without a cosmological constant, a classical theorem due to Hawking states that stationary black holes must be topologically spherical. This result is one of…
A family of solutions to the inverse problem in gravitation: building a theory around a metric
Arthur G. Suvorov
A method is presented to construct a particular, non-minimally coupled scalar-tensor theory such that a given metric is an exact vacuum solution in that theory. In contrast to the…
Quantifying closeness between black hole spacetimes: a superspace approach
Arthur G Suvorov
The set of all metrics that can be placed on a given manifold defines an infinite-dimensional `superspace' that can itself be imbued with the structure of a Riemannian manifold. Ge…
Signatures of Extended Theories of Gravity in Black Hole Oscillations
Arthur G Suvorov
In general relativity, the Kerr metric uniquely represents the geometry surrounding an isolated, rotating black hole. An identification of significant non-Kerr features in some ast…
A metric on the space of neutron star models in general relativity and modified gravity
Arthur G Suvorov
Some pairs of neutron star models can intuitively be thought of as being `closer' together than others, in the sense that more precise observations might be required to distinguish…
Gravitational perturbations of a Kerr black hole in gravity
Arthur G Suvorov
Modified theories of gravity are often built such that they contain general relativity as a limiting case. This inclusion property implies that the Kerr metric is common to many fa…
Causal properties of nonlinear gravitational waves in modified gravity
Arthur George Suvorov, Andrew Melatos
Some exact, nonlinear, vacuum gravitational wave solutions are derived for certain polynomial gravities. We show that the boundaries of the gravitational domain of dependenc…
Ernst formulation of axisymmetric fields in gravity: applications to neutron stars and gravitational waves
Arthur George Suvorov, Andrew Melatos
The Ernst formulation of the Einstein equations is generalised to accommodate theories of gravity. It is shown that, as in general relativity, the axisymmetric field…