Toward understanding the 3.4 μm and 9.7 μm extinction feature variations from the local diffuse interstellar medium to the Galactic ... View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2010-01

AUTHORS

Jian Gao, B. W. Jiang, Aigen Li

ABSTRACT

Observationally, both the 3.4μm aliphatic hydrocarbon C-H stretching absorption feature and the 9.7μm amorphous silicate Si-O stretching absorption feature show considerable variations from the local diffuse interstellar medium (ISM) to Galactic center (GC): both the ratio of the visual extinction (AV) to the 9.7μm Si-O optical depth (Δτ9.7 μm) and the ratio of AV to the 3.4 μm C-H optical depth (Δτ3.4 μm) of the solar neighborhood local diffuse ISM are about twice as much as that of the GC. In this work, we try to explain these variations in terms of a porous dust model consisting of a mixture of amorphous silicate, carbonaceous organic refractory dust (as well as water ice for the GC dust). More... »

PAGES

63-67

References to SciGraph publications

  • 2008-08-05. Optical Properties of Dust in SMALL BODIES IN PLANETARY SYSTEMS
  • 2006-04-27. Dust in the solar system and in extra-solar planetary systems in THE ASTRONOMY AND ASTROPHYSICS REVIEW
  • 2010-01. Comet dust as a mixture of aggregates and solid particles: Model consistent with ground-based and space-mission results in EARTH, PLANETS AND SPACE
  • Identifiers

    URI

    http://scigraph.springernature.com/pub.10.5047/eps.2008.12.006

    DOI

    http://dx.doi.org/10.5047/eps.2008.12.006

    DIMENSIONS

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