304 citations · 2.9k across the 37 of their papers we have counts for
15 papers · 1 filter
Oscillations of MHD shock waves on the surfaces of T Tauri stars
A. V. Koldoba, G. V. Ustyugova, M. M. Romanova +1
This work treats the matter deceleration in a magnetohydrodynamics radiative shock wave at the surface of a star. The problem is relevant to classical T Tauri stars where infalling…
Modeling interaction of relativistic and nonrelativistic winds in binary system PSR 1259-63/SS2883. I.Hydrodynamical limit
S. V. Bogovalov, D. Khangulyan, A. V. Koldoba +2
In this paper, we present a detailed hydrodynamical study of the properties of the flow produced by the collision of a pulsar wind with the surrounding in a binary system. This wor…
2D and 3D MHD Simulations of Disk Accretion by Rotating Magnetized Stars: Search for Variability
M. M. Romanova, A. K. Kulkarni, M. Long +4
We performed 2D and full 3D magnetohydrodynamic simulations of disk accretion to a rotating star with an aligned or misaligned dipole magnetic field. We investigated the rotational…
Numerical simulations of coronal magnetic field loop evolution
T. G. Yelenina, G. V. Ustyugova, A. V. Koldoba
We present the results of the numerical simulations of the interaction between a magnetized star and an imperfectly conducting accretion disk. To analyze the ''star-disk'' interact…
"Propeller" Regime of Disk Accretion to Rapidly Rotating Stars
G. V. Ustyugova, A. V. Koldoba, M. M. Romanova +1
We present results of axisymmetic magnetohydrodynamic simulations of the interaction of a rapidly-rotating, magnetized star with an accretion disk. The disk is considered to have a…
Propeller-driven Outflows and Disk Oscillations
M. M. Romanova, G. V. Ustyugova, A. V. Koldoba +1
We report the discovery of propeller-driven outflows in axisymmetric magnetohydrodynamic simulations of disk accretion to rapidly rotating magnetized stars. Matter outflows in a wi…
The Propeller Regime of Disk Accretion to a Rapidly Rotating Magnetized Star
Marina M. Romanova, Galina V. Ustyugova, Alexander V. Koldoba +1
The propeller regime of disk accretion to a rapidly rotating magnetized star is investigated here for the first time by axisymmetric 2.5D magnetohydrodynamic simulations. An expand…
Three-dimensional Simulations of Disk Accretion to an Inclined Dipole: II. Hot Spots and Variability
Marina M. Romanova, Galina V. Ustyugova, Alexander V. Koldoba +1
The physics of the "hot spots" on stellar surfaces and the associated variability of accreting magnetized rotating stars is investigated for the first time using fully three-dimens…
Three-dimensional Simulations of Disk Accretion to an Inclined Dipole: I. Magnetospheric Flow at Different Theta
Marina M. Romanova, Galina V. Ustyugova, Alexander V. Koldoba +2
We present results of fully three-dimensional MHD simulations of disk accretion to a rotating magnetized star with its dipole moment inclined at an angle Theta to the rotation axis…
Poynting Jets from Accretion Disks
R. V. E. Lovelace, H. Li, A. V. Koldoba +2
We give further considerations on the problem of the evolution of a coronal, force-free magnetic field which threads a differentially rotating, conducting Keplerian disk, extending…
Three Dimensional MHD Simulations of Accretion to an Inclined Rotator: The "Cubed Sphere" Method
A. V. Koldoba, M. M. Romanova, G. V. Ustyugova +1
We describe a three-dimensional, Godunov-type numerical magnetohydrodynamics (MHD) method designed for studying disk accretion to a rotating magnetized star in the general case whe…
MHD Simulations of Disk-Magnetized Star Interactions in Quiescent Regime: Funnel Flows and Angular Momentum Transport
M. M. Romanova, G. V. Ustyugova, A. V. Koldoba +1
Magnetohydrodynamic (MHD) simulations have been used to study disk accretion to a rotating magnetized star with an aligned dipole moment. Quiescent initial conditions were develope…
Funnel Flows from Disks to Magnetized Stars
A. V. Koldoba, R. V. E. Lovelace, G. V. Ustyugova +1
This work considers flows from an accretion disk corotating with the aligned dipole magnetic field of a rotating star. Ideal magnetohydrodynamics (MHD) is assumed with the pressure…
Poynting Jets from Accretion Disks
R. V. E. Lovelace, H. Li, G. V. Ustyugova +2
The powerful narrow jets observed to emanate from many compact accreting objects may arise from the twisting of a magnetic field threading a differentially rotating accretion disk…
Magneto-centrifugally driven winds: comparison of MHD simulations with theory
G. V. Ustyugova, A. V. Koldoba, M. M. Romanova +2
Stationary magnetohydrodynamic (MHD) outflows from a rotating, conducting Keplerian accretion disk threaded by B-field are investigated numerically by time-dependent, axisymmetric…