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Issue A&A
Volume 425, Number 1, October I 2004
Page(s) L9 - L12
Section Letters
DOI http://dx.doi.org/10.1051/0004-6361:200400053



A&A 425, L9-L12 (2004)
DOI: 10.1051/0004-6361:200400053

Letter

Planets opening dust gaps in gas disks

S.-J. Paardekooper1 and G. Mellema2, 1

1  Leiden Observatory, Postbus 9513, 2300 RA Leiden, The Netherlands
    e-mail: paardeko@strw.leidenuniv.nl
2  ASTRON, Postbus 2, 7990 AA Dwingeloo, The Netherlands
    e-mail: gmellema@astron.nl

(Received 7 July 2004 / Accepted 10 August 2004 )

Abstract
We investigate the interaction of gas and dust in a protoplanetary disk in the presence of a massive planet using a new two-fluid hydrodynamics code. In view of future observations of planet-forming disks we focus on the condition for gap formation in the dust fluid. While only planets more massive than 1 Jupiter mass ( ${{M}_{\rm J}}$) open up a gap in the gas disk, we find that a planet of 0.1  ${{M}_{\rm J}}$ already creates a gap in the dust disk. This makes it easier to find lower-mass planets orbiting in their protoplanetary disk if there is a significant population of mm-sized particles.


Key words: hydrodynamics -- stars: planetary systems




© ESO 2004

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