A laboratory simulation of grain destruction in interstellar shocks

Details A laboratory simulation of grain destruction in interstellar shocks A laboratory simulation of grain destruction in interstellar shocks

Aug 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986mnras.221..659d&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 221, Aug. 1, 1986, p. 659-662. NSERC-supported research

Astronomy and Astrophysics

Astronomy

10

Cosmic Dust, Interstellar Matter, Particle Collisions, Shock Wave Interaction, Enstatite, Forsterite, Phase Transformations, Pulsed Lasers, Silicates

Scientific paper

The shock processing of interstellar grains via grain-grain collisions has been simulated in the laboratory using pulsed laser radiation. The silicate Mg2SiO4 (forsterite) heated in this way evaporates to yield molecular SiO as well as atomic species. MgSiO3 (enstatite) yields molecular MgO as well as SiO while the evaporation of solid MgO yields only Mg and O atoms. The detection of molecular MgO in regions of shock excitation would then imply that the composition of interstellar silicates is similar to that of MgSiO3, if grain-grain collisions are important in such shocks.

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