Dust around Type Ia supernovae

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An explanation is given of the low value of R lambda triple bond A lambda/E(B - V), the ratio of absolute to selective extinction deduced from Type Ia supernova observations. The idea involves scattering by dust clouds located in the circumstellar environment, or at the highest velocity shells of the supernova ejecta. The scattered light tends to reduce the effective R lambda in the optical, but has an opposite effect in the ultraviolet. The presence of circumstellar dust can be tested by ultraviolet to near infrared observations and by multi-epoch spectropolarimetry of SNe Ia.

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Wang, Lifan October 20, 2005.

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Description

An explanation is given of the low value of R lambda triple bond A lambda/E(B - V), the ratio of absolute to selective extinction deduced from Type Ia supernova observations. The idea involves scattering by dust clouds located in the circumstellar environment, or at the highest velocity shells of the supernova ejecta. The scattered light tends to reduce the effective R lambda in the optical, but has an opposite effect in the ultraviolet. The presence of circumstellar dust can be tested by ultraviolet to near infrared observations and by multi-epoch spectropolarimetry of SNe Ia.

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  • Journal Name: The Astrophysical Journal; Journal Volume: 635; Journal Issue: 1pt2; Related Information: Journal Publication Date: 10/10/2005

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  • Report No.: LBNL--59037
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 891820
  • Archival Resource Key: ark:/67531/metadc884055

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  • October 20, 2005

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  • Sept. 21, 2016, 2:29 a.m.

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  • Sept. 29, 2016, 8:21 p.m.

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Wang, Lifan. Dust around Type Ia supernovae, article, October 20, 2005; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc884055/: accessed August 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.