Publication
Names
  • S. Merouane
  • Z. Djouadi
  • L. Le Sergeant d'Hendecourt
Title
Relations between aliphatics and silicate components in 12 stratospheric particles deduced from vibrational spectroscopy.
Abstract
Interplanetary dust particles (IDPs) are among the most pristine extraterrestrial samples available in the laboratory for analyses with moderate to high spatial- and spectral-resolution spectroscopic techniques. Their composition can provide precious information on the early stages of the solar nebula as well as on the processes on the surfaces of different small bodies in the solar system from which IDPs originate. In this work, we have analyzed six anhydrous IDPs and six stratospheric particles possibly of cosmic origin through infrared (IR) and Raman microspectroscopy to study and investigate their silicate and organic components. We find that the length/ramification of the aliphatic organics given by the CH2/CH3 ratios in the IDPs is closely linked to the silicate family (pyroxene or olivine) present in the samples. Both IR and Raman data suggest that this relation is not correlated with either aqueous (as evidenced by the absence of aqueous related minerals) or thermal processes (as deduced from Raman measurements). Therefore, this observation might be related to the initial path of formation of the organics on the silicate surfaces, thus tracing a possible catalytic role that silicates would play in the formation and/or ramification of organic matter in the primitive nebula.
Keywords
meteors, meteorites, meteoroids
Content
spectral data, planetary sciences, spectral data use
Year
2014
Journal
The Astrophysical Journal
Volume
780
Pages
174
Pages number
12
Document type
article
Publication state
published