Dust dynamics as a way to contraint the gas density in the Beta-Pictoris disc

Details Dust dynamics as a way to contraint the gas density in the Beta-Pictoris disc Dust dynamics as a way to contraint the gas density in the Beta-Pictoris disc

Nov 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004dps....36.3505t&link_type=abstract

American Astronomical Society, DPS meeting #36, #35.05; Bulletin of the American Astronomical Society, Vol. 36, p.1152

Astronomy and Astrophysics

Astronomy

Scientific paper

The amount of gas in the Beta-Pictoris system is still poorly constrained. The Thi et al.(2001) estimate of at least 50 Earth masses of H2 was later contradicted by FUSE observations setting an upper limit 3 orders of magnitude smaller for the H2 column density. However, Brandeker et al.(2004) noticed that various beta>1 ions (Ca, Fe,..) were surprisingly observed on bound keplerian orbits and argued that a large amount of Hydrogen (40 Earth masses) could act as a ``braking agent" preventing them from being blown out.
We investigate this problem by looking at the effect of gaseous friction on the dust dynamics and use this as a tool to derive constraints on the gas density and its radial distribution. We perform simulations of the evolution of a dust population, continuously produced by parent bodies, embedded in a gaseous medium. We explore different parent bodies distributions and dust size distributions as well as different gas density profiles. We then derive the corresponding scattered light mid-plane profiles for the dust and compare them to observational data. Preliminar results indicate that large amount of gas in the region beyond 100 AU always lead to dust distributions contradicting observational profiles. In this case, high gas densities might be ruled out and an alternative explanation for the puzzling observations of beta>1 ions on keplerian orbits should be found.

Affiliated with

Also associated with

No associations

Rating

Dust dynamics as a way to contraint the gas density in the Beta-Pictoris disc 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 Dust dynamics as a way to contraint the gas density in the Beta-Pictoris disc, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dust dynamics as a way to contraint the gas density in the Beta-Pictoris disc will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1014686