Astronomy and Astrophysics – Astrophysics – Earth and Planetary Astrophysics
Scientific paper
2011-12-11
A&A 538, A114 (2012)
Astronomy and Astrophysics
Astrophysics
Earth and Planetary Astrophysics
Pages 15, Figures 14. Accepted for publication in Astronomy and Astrophysics
Scientific paper
10.1051/0004-6361/201118204
In order to explain grain growth to mm sized particles and their retention in outer regions of protoplanetary disks, as it is observed at sub-mm and mm wavelengths, we investigate if strong inhomogeneities in the gas density profiles can slow down excessive radial drift and can help dust particles to grow. We use coagulation/fragmentation and disk-structure models, to simulate the evolution of dust in a bumpy surface density profile which we mimic with a sinusoidal disturbance. For different values of the amplitude and length scale of the bumps, we investigate the ability of this model to produce and retain large particles on million years time scales. In addition, we introduced a comparison between the pressure inhomogeneities considered in this work and the pressure profiles that come from magnetorotational instability. Using the Common Astronomy Software Applications ALMA simulator, we study if there are observational signatures of these pressure inhomogeneities that can be seen with ALMA. We present the favorable conditions to trap dust particles and the corresponding calculations predicting the spectral slope in the mm-wavelength range, to compare with current observations. Finally we present simulated images using different antenna configurations of ALMA at different frequencies, to show that the ring structures will be detectable at the distances of the Taurus Auriga or Ophiucus star forming regions.
Birnstiel Til
Dullemond Cornelis Petrus
Natta Antonella
Pinilla P.
Ricci Laura
No associations
LandOfFree
Trapping dust particles in the outer regions of protoplanetary disks does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Trapping dust particles in the outer regions of protoplanetary disks, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Trapping dust particles in the outer regions of protoplanetary disks will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-306927