A laboratory approach to the interstellar sulfide dust problem

Abstract

view Abstract Citations (117) References (16) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS A Laboratory Approach to the Interstellar Sulfide Dust Problem Begemann, B. ; Dorschner, J. ; Henning, T. ; Mutschke, H. ; Thamm, E. Abstract In this Letter we communicate optical data of Mg-Fe sulfides in the wavelength range from 10 to 500 micrometer. The sulfides were prepared in our laboratory in order to test the tentative identification of a prominent circumstellar emission band at 30 micrometer observed in carbon-rich Asymptotic Giant Branch (AGB) stars, protoplanetary, and planetary nebulae with Mg-S vibrations in sulfide grains. Arguments in favor of the existence of an interstellar sulfide dust component consisting of FeS or iron-rich Mg-Fe sulfides are discussed. Model calculations for the source IRC +10216 based on the communicated optical data demonstrate their practical use. The possibilities for the observational detection of interstellar FeS bands are considered. Publication: The Astrophysical Journal Pub Date: March 1994 DOI: 10.1086/187238 Bibcode: 1994ApJ...423L..71B Keywords: Asymptotic Giant Branch Stars; Computation; Dust; Extinction; Infrared Astronomy; Infrared Spectra; Interstellar Matter; Iron Compounds; Laboratory Equipment; Magnesium Compounds; Planetary Nebulae; Spectral Reflectance; Sulfides; Chemical Composition; Numerical Analysis; Stellar Models; Synthesis (Chemistry); Astrophysics; INFRARED: GENERAL; ISM: DUST; EXTINCTION; ISM: PLANETARY NEBULAE: GENERAL; STARS: AGB AND POST-AGB; STARS: CIRCUMSTELLAR MATTER; STARS: INDIVIDUAL ALPHANUMERIC: IRC; 10216 full text sources ADS | data products SIMBAD (1)