Issue |
A&A
Volume 385, Number 2, April II 2002
|
|
---|---|---|
Page(s) | 647 - 670 | |
Section | Stellar atmospheres | |
DOI | https://doi.org/10.1051/0004-6361:20020173 | |
Published online | 15 April 2002 |
Nested-grid calculations of disk-planet interaction
1
Astrophysikalisches Institut und Universitäts-Sternwarte, Schillergäßchen 2–3, 07745 Jena, Germany
2
Computational Physics, Auf der Morgenstelle 10, 72076 Tübingen, Germany
Corresponding author: G. D'Angelo, gennaro@astro.uni-jena.de
Received:
16
May
2001
Accepted:
24
January
2002
We study the evolution of embedded protoplanets in a protostellar
disk using very high resolution nested-grid computations.
This method allows us to perform global simulations of planets
orbiting in disks and, at the same time, to resolve in detail
the dynamics of the flow inside the Roche lobe of the planet.
The primary interest of this work lies in the analysis of the
gravitational torque balance acting on the planet. For this purpose
we study planets of different masses, ranging from one Earth-mass up
to one Jupiter-mass, assuming typical parameters of the protostellar
disk.
The high resolution supplied by the nested-grid technique permits an
evaluation of the torques, resulting from short and very short
range disk-planet interactions, more reliable than the one previously
estimated with the aid of numerical methods.
Likewise, the mass flow onto the planet is computed in a more
accurate fashion.
The obtained migration time scales are in the range from few times
104 years, for intermediate mass planets, to 106 years, for
very low and high mass planets. These are longer than earlier
assessments due to the action of circumplanetary material.
Typical growth time scales depend strongly on the planetary mass.
Below 64 Earth-masses, we find this time scale to increase as the
-power of the planet's mass; otherwise it rises as the
-power.
In the case of Jupiter-size planets, the growth time scale is several
times ten thousand years.
Key words: accretion, accretion disks / hydrodynamics / methods: numerical / stars: planetary systems
© ESO, 2002
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