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Interstellar polarization from CO and XCN mantled grains: A severe test for grain alignment mechanisms

Abstract:

We present linear spectropolarimetry in the wavelength range 4.5-4.8 μm of the embedded infrared source W33A. Our observations show for the first time the presence of polarization associated with the CO and XCN ice features, demonstrating that the absorbers reside in or on aligned grains. Both narrow and broad components of the solid CO feature near 4.67 μm are polarized. The detection of polarization associated with the narrow CO component is particularly significant, as the ices responsible...

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Authors


Chrysostomou, A More by this author
Whittet, DCB More by this author
Aitken, DK More by this author
More by this author
Institution:
University of Oxford
Department:
Oxford, MPLS, Physics, Astrophysics
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Publisher:
Institute of Physics Publishing
Journal:
Astrophysical Journal
Volume:
465
Issue:
1 PART II
Publication date:
1996-07-01
EISSN:
1538-4357
ISSN:
0004-637X
URN:
uuid:19fc2316-9d9e-41f2-8425-911a26a1d319
Source identifiers:
345216
Local pid:
pubs:345216

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