Journal Article

On linear dust–gas streaming instabilities in protoplanetary discs

Emmanuel Jacquet, Steven Balbus and Henrik Latter

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 415, issue 4, pages 3591-3598
Published in print August 2011 | ISSN: 0035-8711
Published online August 2011 | e-ISSN: 1365-2966 | DOI:
On linear dust–gas streaming instabilities in protoplanetary discs

More Like This

Show all results sharing this subject:

  • Astronomy and Astrophysics


Show Summary Details


We revisit, via a very simplified set of equations, a linear streaming instability (technically an overstability), which is present in, and potentially important for, dusty protoplanetary discs. The goal is a better understanding of the physical origin of such instabilities, which are notoriously subtle. Rotational dynamics seem to be essential to this type of instability, which cannot be captured by one-dimensional Cartesian models. Dust ‘pile-ups’ in moving pressure maxima are an important triggering mechanism of the instability, and drag feedback of dust upon the gas allows these maxima to be strengthened. Coriolis forces and the background drift counteract the effects of the pressure force.

Keywords: hydrodynamics; instabilities; planets and satellites: formation; protoplanetary discs

Journal Article.  5785 words.  Illustrated.

Subjects: Astronomy and Astrophysics

Full text: subscription required

How to subscribe Recommend to my Librarian

Users without a subscription are not able to see the full content. Please, subscribe or login to access all content.