Interstellar Depletion of Silicon and Iron Probed by Infrared Spectroscopy

Details Interstellar Depletion of Silicon and Iron Probed by Infrared Spectroscopy Interstellar Depletion of Silicon and Iron Probed by Infrared Spectroscopy

Mar 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007asthe.100..124o&link_type=abstract

The Astronomical Herald (ISSN 0374-2466), Vol. 100, No. 3, p. 124 - 129 (2007)

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Chemical Composition, Interstellar Dust

Scientific paper

A study on chemical compositions of interstellar dusts probed by observations of emission lines of silicon and iron ions with two infrared astronomical satellites, the Infrared Space Observatory and the Spitzer Space Telescope is presented. It is found that the abundance of gas-phase silicon in the observed Galactic star-forming regions is much larger than that in the cool interstellar medium. This fact indicates the observational evidence of Si-bearing dust destruction. On the other hand, the abundance of the gas-phase iron does not exceed that in the cool interstellar medium as silicon does. The chemical compositions of the dust on the basis of these results is discussed.

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