VizieR Online Data Catalog: SiO production in interstellar shocks (Schilke+ 1997)
Abstract
We study the production of SiO in the gas phase of molecular outflows, through the sputtering of Si-bearing material in grains. The sputtering is driven by neutral particle impact on charged grains in C-type shocks, at the speed corresponding to ambipolar diffusion. Shock speeds in the range 10<vs<40km/s and preshock densities 104<nH<107cm-3 have been investigated. Sputtering of Si-bearing material in both the cores and the mantles of the grains is considered. We find that, for vs of approximately 25km/s and nH of the order 105cm-3, column densities of SiO similar to those observed in molecular out flow regions can be generated by either mechanism. Impact by particles heavier than helium dominates the core-sputtering process for shock velocities of this order. The profiles of rotational transitions of SiO are computed and compared with observations of molecular outflows. (3 data files).
- Publication:
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VizieR Online Data Catalog
- Pub Date:
- September 1996
- DOI:
- 10.26093/cds/vizier.33210293
- Bibcode:
- 1996yCat..33210293S
- Keywords:
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- Interstellar medium;
- Atomic physics