Gaseous component in the circumstellar environment of Herbig Ae/Be stars.

Details Gaseous component in the circumstellar environment of Herbig Ae/Be stars. Gaseous component in the circumstellar environment of Herbig Ae/Be stars.

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006sf2a.conf..585m&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

A long-standing question of modern astrophysics is how stars and planets form from their parent molecular clouds. It is generally accepted that the collapse of an interstellar molecular cloud core to form a protostar naturally produces a disk-shaped nebula in which planets might form. Evidence is accumulating that a significant fraction of Herbig Ae/Be stars (HAeBes) present us with signatures of massive circumstellar (CS) disks. In this context, HAeBes have gained a lot of interest as possible precursors of β-Pictoris and Vega-type stars, whose CS debris disks are believed to host planetary bodies. This raises the possibility that the environment around the HAeBes truly represents a very early phase of planet formation.
We present the results obtained from spectroscopic observations of HAeBes in different wavelength ranges. Our goal was to better constrain the nature and evolution of the gaseous component in the CS environment of Herbig stars, and in particular, understand the mechanisms of formation and excitation of molecular hydrogen.

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