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Spectropolarimetry of the 3.4 μm feature in the diffuse ISM toward the Galactic Center Quintuplet Cluster

Authors
  • Jean Chiar
  • A J, Adamson
  • Dcb, Whittet
  • A, Chrysostomou
  • J H, Hough
  • T H, Kerr
  • R E, Mason
  • P F, Roche
  • G, Wright
Type
Published Article
Journal
The Astrophysical Journal
Publisher
American Astronomical Society
Publication Date
Nov 01, 2006
Volume
651
Issue
1
Pages
268–268
Source
SETI Institute
License
Unknown

Abstract

Aliphatic hydrocarbons exhibit an absorption feature at 3.4 μm, observed toward sources that sample diffuse regions of the interstellar medium (ISM). The absorbers responsible for this feature are assumed to reside in some component of interstellar dust, but the physical nature of the particles (size, shape, structure, etc.) is uncertain. Observations of interstellar polarization provide discrimination. Since the grains that carry the silicate absorption feature are known to be aligned, polarization across the 3.4 μm hydrocarbon ...

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