Computer Science – Numerical Analysis
Scientific paper
Nov 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990esasp.315...81b&link_type=abstract
In ESA, Formation of Stars and Planets, and the Evolution of the Solar System p 81-86 (SEE N91-18922 10-90)
Computer Science
Numerical Analysis
1
Mathematical Models, Metallic Plasmas, Protoplanets, Spectral Signatures, Stellar Mass Accretion, Accretion Disks, Chemical Analysis, Infrared Astronomy Satellite, Numerical Analysis, Numerical Flow Visualization, Spectrographs
Scientific paper
The IRAS (Infrared Astronomy Satellite) star Beta Pictoris is still the only star detected which has a disk made of both dust and gas. Spectroscopic observations of Beta Pictoris reveal that some metallic absorption lines present redshifted additional components which strongly vary with time. This is interpreted as being the result of the infall of small evaporating cometary like bodies towards the star. Numerical simulations of such infalling bodies are able to reproduce quite faithfully the observed behavior of some metallic ions. New observations presenting previously unobserved features are reproduced by the same model, with only small changes affecting a few parameters. The observed results are considered to be the consequence of the presence of an eventual planetary body somewhere in the disk, the orbit of which is highly elliptical.
Beust Hervé
Ferlet Roger
Lagrange-Henri Anne-Marie
Vidal-Madjar Alfred
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