A&A 402, L5-L8 (2003)
A stream of particles from the Pictoris disc: A possible ejection mechanismN. A. Krivova and S. K. Solanki
Max-Planck-Institute for Aeronomy, Max-Planck-Str. 2, 37191 Katlenburg-Lindau, Germany
(Received 5 September 2002 / Accepted 12 March 2003 )
Recently, a stream of particles originating from the direction of Pictoris, a young main sequence star surrounded by a dust disc, has been reported (Baggaley 2000). Standard mechanisms of particle ejection from a disc fail to reproduce the properties of this stream. We find that scattering by a giant proto-planet with properties taken from the literature is consistent with the observations. The fact that a straightforward ejection mechanism reproduces the data supports the identification of the particle stream's source with Pic. Our work also indicates that protoplanetary dust discs form a potentially rich source of large interstellar grains, as widely detected in the Solar System.
Key words: circumstellar matter -- meteors, meteoroids -- planetary systems -- stars: individual: Pic
Offprint request: N. A. Krivova, firstname.lastname@example.org
© ESO 2003