Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007sf2a.conf..363b&link_type=abstract
SF2A-2007: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics held in Grenoble, France, July
Astronomy and Astrophysics
Astrophysics
Scientific paper
Transient spectral events towards the southern star Beta pictoris have been attributed to the sublimation of transiting star-grazers planetesimals (Falling Evaporating Bodies, or FEBs). The FEBs are supposed to originate from mean-motion resonances with a massive planet. In 2004, spectral emission in Ca II and Fe II was detected at 100 AU away from the star, but above the midplane of the disk (Brandeker et al. 2004). We show that the presence of off-plane ions can be explained in the frame of the FEB scenario, as due to inclination oscillations caused by the resonance (Beust & Valiron 2007) in the high eccentricity regime. The ions released by the FEBS in this regime keep track of their inclination and start evolving out of the plane. Their are stopped at 100 AU from the star probably by some dense medium.
Beust Hervé
Valiron Pierre
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