80 citations · 172 across the 15 of their papers we have counts for
15 papers
Thin accretion-disc transfer functions in the q-metric spacetime: quadrupolar lensing signatures
Saken Toktarbay, Manas Khassanov, Aray Muratkhan +3
We study geometrically thin equatorial disc images in the static, axisymmetric q-metric spacetime using backward ray tracing. The Schwarzschild solution is recovered at ; for…
Rotation-Induced Effective Anisotropy in White Dwarfs as a Newtonian Benchmark with Relativistic Scale Assessment
Aray Muratkhan, Aliya Taukenova, Saken Toktarbay +1
We develop a one-dimensional Newtonian reduction for uniformly rotating cold white dwarfs in which the angle-averaged centrifugal support is represented by an effective anisotropic…
Interaction of Black Hole Magnetospheres with Inclined Ambient Fields
Madina Zhakipova, Arman Tursunov, Saken Toktarbay +1
Magnetic fields play a central role in black hole astrophysics, powering relativistic jets and other energetic phenomena. While near-horizon magnetic field is usually assumed to or…
Dyon-like black hole solutions in the model with two Abelian gauge fields
M. E. Abishev, V. D. Ivashchuk, A. N. Malybayev +1
Dilatonic black hole dyon-like solutions in the gravitational model with a scalar field, two 2-forms, two dilatonic coupling constants , , obeying $λ_1 \ne…
Black hole in a combined magnetic field: ionized accretion disks in the jetlike and looplike configurations
Saltanat Kenzhebayeva, Saken Toktarbay, Arman Tursunov +1
Magnetic fields surrounding black holes are responsible for various astrophysical phenomena related to accretion processes and relativistic jets. Depending on the source, the confi…
Gravitational field of slightly deformed naked singularities
Saken Toktarbay, Hernando Quevedo, Medeu Abishev +1
We derive a particular approximate solution of Einstein equations, describing the gravitational field of a mass distribution that slightly deviates from spherical symmetry. The dev…
Approximate perfect fluid solutions with quadrupole moment
Medeu Abishev, Farida Belissarova, Kuantay Boshkayev +4
We investigate the interior Einstein's equations in the case of a static, axially symmetric, perfect fluid source. We present a particular line element that is specially suitable f…
A stationary q-metric
Saken Toktarbay, Hernando Quevedo
We present a stationary generalization of the static metric, the simplest generalization of the Schwarzschild solution that contains a quadrupole parameter. It possesses three…
Orbital stability of the restricted three body problem in General Relativity
M. Abishev, H. Quevedo, S. Toktarbay +1
We consider the problem of orbital stability of the motion of a test particle in the restricted three-body problem, by using the orbital moment and its time derivative. We show tha…
A perfect-fluid spacetime for a slightly deformed mass
Medeu Abishev, Kuantay Boshkayev, Hernando Quevedo +1
We present approximate exterior and interior solutions of Einstein's equations which describe the gravitational field of a static deformed mass distribution. The deformation of the…
Accretion disks around a mass with quadrupole
Medeu Abishev, Kuantay Boshkayev, Hernando Quevedo +1
We consider the stability properties of test particles moving along circular orbits around a mass with quadrupole. We show that the quadrupole modifies drastically the properties o…
On the equivalence of approximate stationary axially symmetric solutions of Einstein field equations
Kuantay Boshkayev, Hernando Quevedo, Saken Toktarbay +2
We study stationary axially symmetric solutions of the Einstein vacuum field equations that can be used to describe the gravitational field of astrophysical compact objects in the…
Motion of test particles in the field of a naked singularity
K. Boshkayev, E. Gasperin, A. C. Gutierrez-Pineres +2
We investigate the motion of test particles in the gravitational field of a static naked singularity generated by a mass distribution with quadrupole moment. We use the quadrupole-…
Generating static perfect-fluid solutions of Einstein's equations
Hernando Quevedo, Saken Toktarbay
We present a method for generating exact interior solutions of Einstein's equations in the case of static and axially symmetric perfect-fluid spacetimes. The method is based upon a…
Quadrupolar gravitational fields described by the metric
Hernando Quevedo, Saken Toktarbay, Aimuratov Yerlan
We investigate the Zipoy-Voorhees metric (metric) as the simplest static, axially symmetric solution of Einstein's vacuum field equations that possesses as independent paramete…