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Organics and Ices in Galactic Dust

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Book cover New Extragalactic Perspectives in the New South Africa

Part of the book series: Astrophysics and Space Science Library ((ASSL,volume 209))

Abstract

Hydrocarbon absorption (3.4 μm) along several different sightlines through the galaxy indicates that the dust carrier lies in the diffuse interstellar medium (DISM). Correlations of the hydrocarbon and silicate absorption features suggest an increased abundance of both in the direction of the galactic center. Dense molecular clouds do not exhibit the same type of 3.4 μm feature as seen in the DISM, which is puzzling in light of dust cycling times. Laboratory organics produced by different processes are compared to the DISM features. The 3.4 μm feature has now been detected in other galaxies, which suggests that the widespread distribution of organic material in our own galaxy may be common to other galaxies as well.

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Author information

Authors and Affiliations

  1. NASA Ames Research Center, MS245-3, Moffett Field, CA, 94035-1000, USA

    Yvonne J. Pendleton

Authors
  1. Yvonne J. Pendleton
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Editor information

Editors and Affiliations

  1. Department of Computational and Applied Mathematics, University of the Witwatersrand, Johannesburg, South Africa

    David L. Block

  2. Huygens Astrophysics Laboratory, University of Leiden, The Netherlands

    J. Mayo Greenberg

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© 1996 Kluwer Academic Publishers

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Pendleton, Y.J. (1996). Organics and Ices in Galactic Dust. In: Block, D.L., Greenberg, J.M. (eds) New Extragalactic Perspectives in the New South Africa. Astrophysics and Space Science Library, vol 209. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-0335-7_15

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  • DOI: https://doi.org/10.1007/978-94-009-0335-7_15

  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-94-010-6637-2

  • Online ISBN: 978-94-009-0335-7

  • eBook Packages: Springer Book Archive

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