NDLI: On the origin of the azimuthal asymmetry in pole-on protoplanetary disks: The case of LkHα 101

Content Provider	Springer Nature Link
Author	Demidova, T. V. Grinin, V. P.
Copyright Year	2014
Abstract	The model of a protoplanetary disk around a star with a low-mass companion (M $_{2}$: M $_{1}$ ≤ 0.1) moving in a circular orbit inclined at a small angle to the disk plane (≤10°) is considered. The SPH method is used to calculate the hydrodynamic flows. The orbital motion of the companion leads to a nonuniform distribution of matter in the disk: a matter-free gap, density waves, and gas flows are formed in it. As a result of perturbations, the inner part of the disk is inclined relative to its periphery and does not coincide with the orbital plane of the companion either. This leads to an anisotropic illumination of the disk by the star and, as a consequence, to the appearance of a large-scale inhomogeneity in the disk image: it has a bright horseshoe-shaped region and a small shadow zone located asymmetrically relative to the line of nodes. An asymmetry of the disk image is clearly seen even when it is viewed pole-on. The orbital motion of the companion does not lead to any synchronous motion of the dark (shadow) and bright regions: they only execute small oscillations relative to some preferential direction. The asymmetric image of the disk around the star LkHα 101 seen nearly pole-on can be reproduced rather accurately within the proposed model. A study of such asymmetric disks opens up new opportunities for the search of massive bodies in the neighborhoods of young stars.
Starting Page	334
Ending Page	342
Page Count	9
File Format	PDF
ISSN	10637737
Journal	Astronomy Letters
Volume Number	40
Issue Number	6
e-ISSN	15626873
Language	English
Publisher	Pleiades Publishing
Publisher Date	2014-06-15
Publisher Place	Moscow
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	young stars protoplanetary disks Astronomy, Observations and Techniques Astrophysics and Astroparticles
Content Type	Text
Resource Type	Article
Subject	Astronomy and Astrophysics Space and Planetary Science

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