The Core-Mantle Interstellar Dust Model View Full Text


Ontology type: schema:Chapter     


Chapter Info

DATE

1996

AUTHORS

J. Mayo Greenberg , Aigen Li

ABSTRACT

The silicate core-organic refractory model is used as a basis for describing the cyclic evolution of interstellar dust between diffuse and molecular clouds. Infrared absorption observed in the 3.4 μm region is shown to be very well characterized by laboratory analog organics which are first created as residues of ultraviolet photoprocessed ices and then subjected to further solar ultraviolet radiation in simulation of organic grain mantles processed in diffuse clouds. The silicate core-organic refractory mantle elongated particles are shown to provide an excellent match to the observed infrared polarization in the 10 and 20 μm region. Alternative grain models, such as the silicate/graphite model and the porous agglomerate model of very small interstellar silicates, amorphous carbon, and graphite particles are shown to lead to critical inconsistencies with observations as related to linear polarization and abundance. More... »

PAGES

43-70

Book

TITLE

The Cosmic Dust Connection

ISBN

978-94-010-6384-5
978-94-011-5652-3

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/978-94-011-5652-3_2

DOI

http://dx.doi.org/10.1007/978-94-011-5652-3_2

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1036145043


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