Volume 487, Number 1, August III 2008
|Page(s)||L9 - L12|
|Published online||01 July 2008|
Letter to the Editor
Migration of protoplanets in radiative discs
Institut für Astronomie & Astrophysik, Universität Tübingen, Auf der Morgenstelle 10, 72076 Tübingen, Germany e-mail: firstname.lastname@example.org
Accepted: 18 June 2008
Context. In isothermal discs, the migration of protoplanets is directed inwards. For small planetary masses, the standard type I migration rates are so high that this can result in an unrealistic loss of planets into the stars.
Aims. We investigate the planet-disc interaction in non-isothermal discs and analyse the magnitude and direction of migration for an extended range of planet masses.
Methods. We performed detailed two-dimensional numerical simulations of embedded planets including heating/cooling effects as well as radiative diffusion for realistic opacities.
Results. In radiative discs, small planets with migrate outwards at a rate comparable to the absolute magnitude of standard type I migration. For larger masses, the migration is inwards and approaches the isothermal, type II migration rate.
Conclusions. Our findings are particularly important for the first growth phase of planets and ease the problem of too rapid inward type I migration.
Key words: stars: planetary systems: formation / accretion, accretion disks
© ESO, 2008
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.