Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006sf2a.conf..463d&link_type=abstract
SF2A-2006: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics Eds.: D. Barret, F. Casoli, G.
Astronomy and Astrophysics
Astrophysics
Scientific paper
Circumstellar disks are ubiquitous around young stars with intermediate ages around a few million years. They are a natural outcome of the star formation process. The pre-main sequence stars of intermediate-mass, the Herbig Ae (HAe) stars, represent a particularly interesting laboratory for studying disks evolution. Although great progress has been made in modelling the disk struture with radiative transfer models able to reproduce the SEDs of Herbig Ae stars, the structure of the disks is not uniquely constrained. Spatially resolved observations are needed to better constrain the geometry of the disks. Transiently-heated polycyclic aromatic hydrocarbons (PAHs) are good tracers of the disk geometry. If the disk is flaring, the PAHs located at the surface of the disk are in direct view of the central star and their emission allows to access the disk structure up to large distances from the star.
Doucet Coralie
Duchene Gaspard
Habart Emilie
Lagage Pierre Olivier
Menard Franccois
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