On the nature of the azimuthal asymmetry of protoplanetary disks observed pole-on. The case LkHa 101

Abstract

The model of a protoplanetary disk of a star with a low-mass companion ($M_2:M_1\le 0.1$), moving on a circular orbit, which slightly inclined to the disk plane ($\le 10^{\circ }$), is considered. The SPH-method is used to calculate gas-dynamic ows. The motion of the companion on the orbit leads to the inhomogeneous distribution of the matter in the disk: there are a cleared gap, density waves and streams of matter. Because of the disturbances the inner part of the disk is tilted to its periphery and also do not coincides with the orbit plane of the companion. It leads to anisotropic illumination of the disk by the star and, as a consequence, to the appearance of large-scale inhomogeneity on the disk image: it has a bright area in the form of a \horseshoe" and a small shadow zone located asymmetric with respect to the line of nodes. The asymmetry of the disk image is clearly visible even if it is observed pole-on. The motion of the companion on the orbit does not lead to the synchronous movement of the shadow and bright areas: they only make small oscillations relative to the some direction. By using the proposed model we an fairly accurately reproduce the asymmetric image of the disk of star LkH$\alpha$ 101, observed almost pole-on. The study of such asymmetric disks opens up new opportunity for searching massive bodies around young stars.

arXiv comment11 pages, 5 figures

References in corpus (33)

• Shrinking binary and planetary orbits by Kozai cycles with tidal friction
• Obliquities of Hot Jupiter host stars: Evidence for tidal interactions and primordial misalignments
• Formation of Hot Planets by a combination of planet scattering, tidal circularization, and Kozai mechanism
• Spin-orbit angle measurements for six southern transiting planets; New insights into the dynamical origins of hot Jupiters
• Discovery of Small-Scale Spiral Structures in the Disk of SAO 206462 (HD 135344B): Implications for the Physical State of the Disk from Spiral Density Wave Theory
• Chaotic star formation and the alignment of stellar rotation with disc and planetary orbital axes
• HST/NICMOS Imaging of Disks and Envelopes Around Very Young Stars
• The evolution of a supermassive binary caused by an accretion disc
• Direct Imaging of Fine Structures in Giant Planet Forming Regions of the Protoplanetary Disk around AB Aurigae
• The tidally induced warping, precession and truncation of accretion discs in binary systems: three-dimensional simulations
• Resolved Inner Disks around Herbig Ae/Be Stars
• Evolution of Spin Direction of Accreting Magnetic Protostars and Spin-Orbit Misalignment in Exoplanetary Systems
• A Likely Close-In Low-Mass Stellar Companion to the Transitional Disk Star HD 142527
• Vortex generation in protoplanetary disks with an embedded giant planet
• Circumbinary disk evolution
• Lopsided dust rings in transition disks
• Dynamical Relaxation and Massive Extrasolar Planets
• The complex circumstellar environment of HD142527
• Disks around CQ Tau and MWC 758: dense PDR or gas dispersal?
• Resonant inclination excitation of migrating giant planets
• The hydrodynamical response of a tilted circumbinary disc: linear theory and non-linear numerical simulations
• Interaction between massive planets on inclined orbits and circumstellar discs
• Stable counteralignment of a circumbinary disc
• Evolution of warped and twisted accretion discs in close binary systems
• Gas Accretion from a Circumbinary Disk
• Evolution of inclined planets in three-dimensional radiative discs
• The Asymmetric Thermal Emission of Protoplanetary Disk Surrounding HD 142527 Seen by Subaru/COMICS
• Imaging the disk around the luminous young star LkHalpha 101 with infrared interferometry
• Mid-InfraRed imaging of the circumstellar dust around three Herbig Ae stars : HD135344, CQTau, HD163296
• Hydrodynamic Processes in Young Binary Systems as a Source of Cyclic Variations of Circumstellar Extinction
• Modulation of Circumstellar Extinction in a Young Binary System with a Low-Mass Companion in a Noncoplanar Orbit
• Bimodal Brightness Oscillations in Models of Young Binary Systems
• Asymmetric Illumination of a Circumbinary Disk in the Presence of a Low-Mass Companion

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