Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005jrasc..99s.137f&link_type=abstract
Journal of the Royal Astronomical Society of Canada, Vol. 99, No. 4, p.137
Astronomy and Astrophysics
Astronomy
Scientific paper
The main-sequence star beta Pictoris has a well known debris disk composed of gas and dust, which is thought to be a remnant of (possibly still ongoing) planet formation. This system poses an interesting puzzle: due to strong radiation force, several constituents of the gas are expected to reach high radial velocities, a result that contradicts observations, which show the gas to be consistent with Keplerian rotation around the star. A braking mechanism is thus acting on these accelerated particles. We have explored several physical mechanisms that can account for slowing down the accelerated gas. The ultimate goal is to constrain the late gas evolution in circumstellar disks, an issue directly related to the formation of gaseous planets.
Brandeker Alexis
Fernandez Rodrigo
Wu Yanqin
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