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Spectrophotometry of SN 1987A from the Kuiper Airborne Observatory

Published online by Cambridge University Press:  12 April 2016

Diane H. Wooden*
Affiliation:
NASA Ames Research Center, MS 245-6, Moffett Field, CA 94035-1000, USA
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Explosion calculations of SN 1987A generate pictures of Rayleigh-Taylor fingers of radioactive 56Ni (56Ni → 56Co → 56Fe) which are boosted to velocities of several thousand km s-1. From the KAO observations of the mid-IR iron lines, a picture of the iron in the ejecta emerges which is consistent with the ‘frothy iron fingers’ having expanded to fill about 50% of the metal-rich volume of the ejecta (vm ≤ 2500 km s-1). The ratio of the nickel line intensities I([Ni I]7.5µm)/I([Ni II]6.6µm) yields a high ionization fraction of xNi ≥ 0.9 in the volume associated with the iron-group elements at day 415, before dust condenses in the ejecta.

Type
SN 1987A, SN 1993J, and Other Supernovae
Copyright
Copyright © Cambridge University Press 1996

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Spectrophotometry of SN 1987A from the Kuiper Airborne Observatory
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