Vortex migration in protoplanetary disks
Reads0
Chats0
TLDR
In this article, the radial migration of vortices in two-dimensional isothermal gaseous disks was studied and it was shown that a vortex core, orbiting at the local gas velocity, induces velocity perturbations that propagate away from the vortex as density waves.Abstract:
We consider the radial migration of vortices in two-dimensional isothermal gaseous disks. We find that a vortex core, orbiting at the local gas velocity, induces velocity perturbations that propagate away from the vortex as density waves. The resulting spiral wave pattern is reminiscent of an embedded planet. There are two main causes for asymmetries in these wakes: geometrical effects tend to favor the outer wave, while a radial vortensity gradient leads to an asymmetric vortex core, which favors the wave at the side that has the lowest density. In the case of asymmetric waves, which we always find except for a disk of constant pressure, there is a net exchange of angular momentum between the vortex and the surrounding disk, which leads to orbital migration of the vortex. Numerical hydrodynamical simulations show that this migration can be very rapid, on a time scale of a few thousand orbits, for vortices with a size comparable to the scale height of the disk. We discuss the possible effects of vortex migration on planet formation scenarios.read more
Citations
More filters
Book
The Exoplanet Handbook
TL;DR: In this paper, the authors present an overview of the solar system and its evolution, including the formation and evolution of stars, asteroids, and free-floating planets, as well as their internal and external structures.
The Exoplanet Handbook: Formation and evolution
TL;DR: An overview of the processes described in this chapter is as follows in this paper, where the authors start with star formation in molecular clouds, and then gravitationally accumulate their mantles of ice and/or gas.
Journal ArticleDOI
Large-Scale Asymmetries in the Transitional Disks of SAO 206462 and SR 21
TL;DR: In this article, the Atacama Large Millimeter/submillimeter Array (ALMA) observations in the dust continuum (690 GHz, 0.45 mm) and 12CO J=6-5 spectral line emission, of the transitional disks surrounding the stars SAO 206462 and SR 21 were presented.
References
More filters
Journal ArticleDOI
Handbook of Mathematical Functions
Journal ArticleDOI
A powerful local shear instability in weakly magnetized disks. I - Linear analysis. II - Nonlinear evolution
Steven A. Balbus,John F. Hawley +1 more
TL;DR: In this article, a linear analysis is presented of the instability, which is local and extremely powerful; the maximum growth rate which is of the order of the angular rotation velocity, is independent of the strength of the magnetic field.
Journal ArticleDOI