Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006sf2a.conf..577d&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
1
Scientific paper
Silicate dust is ubiquitous in the Interstellar Medium (ISM). It is thought to be, primarily, the product of the mass loss phase of oxygen rich Asymptotic Giant Branch (AGB) stars and to be transported into the ISM by stellar winds. In the ISM, dust is subjected to many processes which could explain its observed structural forms. In order to explain the different observed structures (amorphous, crystalline and often both), we have developed in the laboratory an experimental protocol simulating the different stages in the dust life-cycle (including formation, annealing and irradiation experiments). The synthesized and processed samples are studied by infrared (IR) spectroscopy and electron microscopy in order to infer their chemical, structural and micro-structural characteristics. The results are compared to astronomical observations and to Interplanetary Dust Particles (IDPs) collected in the upper Earth atmosphere by NASA.
d'Hendecourt Louis
Davoisne C.
Djouadi Zahia
Jones Allan
Leroux Hugues
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