82 citations · 873 across the 60 of their papers we have counts for
63 papers
R Coronae Borealis fadings: a dusty gas cloud eclipse model
Mark A. Walker, Artem V. Tuntsov, Arthur G. Suvorov
R Coronae Borealis stars (RCBs) are hydrogen-deficient supergiants that undergo deep fading events due to transient extinction by dust. First observed over two centuries ago, that…
Transient discs around isolated accreting neutron stars
Marina D. Afonina, Anton V. Biryukov, Sergei B. Popov +1
Mature, isolated neutron stars can accrete from the interstellar medium. Due to turbulence, the accreted gas can have a substantial angular momentum and form a disc around the comp…
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…
Population synthesis and detection prospects for Galactic long-period transients with LISA
Arthur G. Suvorov, Nikolaos Karnesis, Valeriya Korol
The recently-discovered long-period radio transients represent a puzzling new class of astrophysical sources, some of which are thought to be compact binary systems emitting a puls…
Magnetorotational instabilities in solids: Application to neutron-star crusts
Arthur G. Suvorov, Thomas Celora, Kostas D. Kokkotas
The magnetorotational instability can generate strong, turbulent substructure within magnetized shear flows. The efficacy of the mechanism as a function of microphysical aspects of…
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…
Dynamics of magnetoviscous warped discs around compact objects
Arthur G. Suvorov, Kostas Glampedakis
Accretion discs that are tilted with respect to their compact hosts can warp out-of-plane through general relativistic frame-dragging. Warp influences disc dynamics in ways that ha…
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…
General-relativistic magnetar magnetospheres in 3D with physics-informed neural networks
Petros Stefanou, Arthur G. Suvorov, José A. Pons
Magnetar phenomena are likely intertwined with the location and structure of magnetospheric currents. General-relativistic effects are important in shaping the force-free equilibri…
Revealing the nature of long-period transients with space-based gravitational-wave interferometers
Arthur G. Suvorov, Clara Dehman, José A. Pons
A few members of the recently discovered class of long-period transients have been identified as binaries with white-dwarf primaries. In most cases, however, electromagnetic data a…
Late-blooming magnetars: awakening as long period transients after a dormant cooling epoch
Arthur G. Suvorov, Clara Dehman, José A. Pons
Long-period transients are an elusive class of compact objects uncovered by radio surveys. While magnetars are a leading candidate for those sources that appear isolated, several o…
Non-linear saturation of gravito-inertial modes excited by tidal resonances in binary neutron stars
Alexis Reboul-Salze, Aurélie Astoul, Hao-Jui Kuan +1
During the last seconds of a binary neutron-star merger, the tidal force can excite stellar oscillation modes to large amplitudes. From the perspective of premerger electromagnetic…
Magnetar structure in non-linear electrodynamics with mixed poloidal-toroidal fields
Arthur G. Suvorov, José A. Pons
Magnetars have inferred polar field strengths in excess of the Schwinger limit, where non-linear electromagnetic effects can be significant. Their internal fields may be even stron…
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…
Tidal disruption of "snow clouds" by unassociated stars
Arthur G. Suvorov, Mark A. Walker
It has been suggested that star-forming galaxies may host a substantial, dark reservoir of gas in the form of planetary-mass molecular clouds that are so cold that c…
Premerger phenomena in neutron-star binary coalescences
Arthur G. Suvorov, Hao-Jui Kuan, Kostas D. Kokkotas
A variety of high-energy events can take place in the seconds leading up to a binary neutron-star merger. Mechanisms involving tidal resonances, electrodynamic interactions, or sho…
Couplings of torsional and shear oscillations in a neutron star crust
Hajime Sotani, Arthur G. Suvorov, Kostas D. Kokkotas
Mature neutron stars are thought to be sufficiently cold that nuclei in the outer layers freeze, solidifying a crust. Crustal elasticity allows the star to support a set of seismic…
Magnetic amplification in premerger neutron stars through resonance-induced magnetorotational instabilities
Arthur G. Suvorov, Hao-Jui Kuan, Alexis Reboul-Salze +1
Tidal resonances in the final seconds of a binary neutron-star inspiral can excite oscillation modes in one or both of the constituents to large amplitudes. Under favorable circums…
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…
Measuring spin in coalescing binaries of neutron stars showing double precursors
Hao-Jui Kuan, Arthur G. Suvorov, Kostas D. Kokkotas
Gamma-ray bursts resulting from binary neutron-star mergers are sometimes preceded by precursor flares. These harbingers may be ignited by quasi-normal modes, excited by orbital re…