TY - JOUR

T1 - Anisotropic illumination of a circumbinary disk in the presence of a low-mass companion

AU - Demidova, T.V.

AU - Grinin, V.P.

AU - Sotnikova, N.Y.

PY - 2013

Y1 - 2013

N2 - The model of a young star with a protoplanetary disk and a low-mass companion ( q ≤ 0.1) moving in a circular orbit inclined to the disk plane is considered. Hydrodynamic models of such a system have been calculated by the SPH method. The perturbations in the disk caused by the orbital motion of the companion are shown to lead to a strong dependence of the disk illumination conditions on azimuth (because of extinction variations between the star and the disk surface) and, as a result, to the appearance of a large-scale asymmetry in the disk images. Calculations show that the dependence of the disk illumination on azimuth is stronger in the central part of the disk than on the periphery. The bright and dark (shadow) regions are located asymmetrically relative to the line of nodes. The sizes of these regions and their positions on the disk depend on model parameters and orbital phase. During the orbital motion, the bright and dark regions do not follow the companion but execute small-amplitude oscillations rela

AB - The model of a young star with a protoplanetary disk and a low-mass companion ( q ≤ 0.1) moving in a circular orbit inclined to the disk plane is considered. Hydrodynamic models of such a system have been calculated by the SPH method. The perturbations in the disk caused by the orbital motion of the companion are shown to lead to a strong dependence of the disk illumination conditions on azimuth (because of extinction variations between the star and the disk surface) and, as a result, to the appearance of a large-scale asymmetry in the disk images. Calculations show that the dependence of the disk illumination on azimuth is stronger in the central part of the disk than on the periphery. The bright and dark (shadow) regions are located asymmetrically relative to the line of nodes. The sizes of these regions and their positions on the disk depend on model parameters and orbital phase. During the orbital motion, the bright and dark regions do not follow the companion but execute small-amplitude oscillations rela

KW - protoplanetary disks

KW - hydrodynamics

KW - low-mass companions

KW - noncoplanar orbits

U2 - 10.1134/S106377371212002X

DO - 10.1134/S106377371212002X

M3 - Article

VL - 39

SP - 26

EP - 37

JO - Astronomy Letters

JF - Astronomy Letters

SN - 1063-7737

IS - 1

ER -