Ultraviolet radiation inside interstellar grain  aggregates. II. Field depolarization.

Saija, Rosalba; Cecchi Pestellini, C.; Iati', M. A.; Giusto, A.; Borghese, Ferdinando; Denti, Paolo; Aiello, S.

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We study the polarization of the UV light within the cavities of interstellar grain aggregates modeled as homogeneous spheres containing several spherical voids. The incident field is a linearly polarized plane wave.We found that field depolarization occurs in all examined cases so that the field within the cavities has the features of an elliptically polarized wave. The depolarization of the field does not depend on the material of the grains but on the geometry of the problem only. The implications of this result for the interstellar photochemistry are briefly discussed.

Titolo:	Ultraviolet radiation inside interstellar grain aggregates. II. Field depolarization.
Autori:	SAIJA, Rosalba C. CECCHI PESTELLINI M. A. IATI' A. GIUSTO BORGHESE, Ferdinando DENTI, Paolo S. AIELLO mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	2005
Rivista:	THE ASTROPHYSICAL JOURNAL
Abstract:	We study the polarization of the UV light within the cavities of interstellar grain aggregates modeled as homogeneous spheres containing several spherical voids. The incident field is a linearly polarized plane wave.We found that field depolarization occurs in all examined cases so that the field within the cavities has the features of an elliptically polarized wave. The depolarization of the field does not depend on the material of the grains but on the geometry of the problem only. The implications of this result for the interstellar photochemistry are briefly discussed.
Handle:	http://hdl.handle.net/11570/1419922
Appare nelle tipologie:	14.a.1 Articolo su rivista

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