Large dust grains in the inner region of circumstellar disks

Details Large dust grains in the inner region of circumstellar disks Large dust grains in the inner region of circumstellar disks

2006-01-19

arxiv.org/abs/astro-ph/0601438v1

Astronomy and Astrophysics

Astrophysics

Accepted for publication in A&A. 11 pages, 8 figures

Scientific paper

10.1051/0004-6361:20054647

CONTEXT: Simple geometrical ring models account well for near-infrared interferometric observations of dusty disks surrounding pre-main sequence stars of intermediate mass. Such models demonstrate that the dust distribution in these disks has an inner hole and puffed-up inner edge consistent with theoretical expectations. AIMS: In this paper, we reanalyze the available interferometric observations of six intermediate mass pre-main sequence stars (CQ Tau, VV Ser, MWC 480, MWC 758, V1295 Aql and AB Aur) in the framework of a more detailed physical model of the inner region of the dusty disk. Our aim is to verify whether the model will allow us to constrain the disk and dust properties. METHODS: Observed visibilities from the literature are compared with theoretical visibilities from our model. With the assumption that silicates are the most refractory dust species, our model computes self-consistently the shape and emission of the inner edge of the dusty disk (and hence its visibilities for given interferometer con gurations). The only free parameters in our model are the inner disk orientation and the size of the dust grains. RESULTS: In all objects with the exception of AB Aur, our self-consistent models reproduce both the interferometric results and the near-infrared spectral energy distribution. In four cases, grains larger than 1.2 micron, and possibly much larger are either required by or consistent with the observations. The inclination of the inner disk is found to be always larger than 30 deg, and in at least two objects much larger.

Affiliated with

Also associated with

No associations

Rating

Large dust grains in the inner region of circumstellar 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 Large dust grains in the inner region of circumstellar disks, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Large dust grains in the inner region of circumstellar disks will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-449223