Book contents
- Frontmatter
- Contents
- Participants
- Preface
- Acknowledgements
- Observations of Supernovae and the Cosmic Distance Scale
- Type Ia Supernovae
- Type Ib and Type II Supernovae
- SN 1987A, SN 1993J, and Other Supernovae
- X-Rays and γ-Rays from SN 1987A
- Spectrophotometry of SN 1987A from the Kuiper Airborne Observatory
- Infrared Spectroscopy of SN 1987A
- SN 1987A: Observations at Later Phases
- Freeze out, IR-Catastrophes, and Non-thermal Emission in SNe
- Understanding the Nebular Spectrum of SN 1987A
- The Oxygen 1.13 µm Fluorescence Line of SN 1987A: a Diagnostic for the Ejecta of Hydrogen-Rich Supernovae
- Review of Contributions to the Workshop on SN 1993J
- A Determination of the Properties of the Peculiar SNIa 1991T through Models of its Early-time Spectra
- Supernovae and Circumstellar Matter
- Supernova Remnants
- Catalogues
- List of Contributed Papers
Freeze out, IR-Catastrophes, and Non-thermal Emission in SNe
from SN 1987A, SN 1993J, and Other Supernovae
Published online by Cambridge University Press: 04 August 2010
- Frontmatter
- Contents
- Participants
- Preface
- Acknowledgements
- Observations of Supernovae and the Cosmic Distance Scale
- Type Ia Supernovae
- Type Ib and Type II Supernovae
- SN 1987A, SN 1993J, and Other Supernovae
- X-Rays and γ-Rays from SN 1987A
- Spectrophotometry of SN 1987A from the Kuiper Airborne Observatory
- Infrared Spectroscopy of SN 1987A
- SN 1987A: Observations at Later Phases
- Freeze out, IR-Catastrophes, and Non-thermal Emission in SNe
- Understanding the Nebular Spectrum of SN 1987A
- The Oxygen 1.13 µm Fluorescence Line of SN 1987A: a Diagnostic for the Ejecta of Hydrogen-Rich Supernovae
- Review of Contributions to the Workshop on SN 1993J
- A Determination of the Properties of the Peculiar SNIa 1991T through Models of its Early-time Spectra
- Supernovae and Circumstellar Matter
- Supernova Remnants
- Catalogues
- List of Contributed Papers
Summary
Freeze out effects and the IR-catastrophe are discussed for SN 1987A and for Type Ia SNe. We show that the light curves of the optical lines in SN 1987A provide strong evidence for the IR-catastrophe. We also argue that most optical lines are dominated by non-thermal excitation after ∼ 800 days. The level of this emission is set mainly by the total mass of the elements. Models of the [OI]λλ6300 – 64 light curve show that an oxygen mass of ∼ 1.5M⊙ is needed. Light curve models for Type Ia SNe display a sharp decrease in the optical flux as a result of the IR-catastrophe at ∼ 500 days, producing UBV-photometry inconsistent with observations of SN 1972E by Kirshner & Oke (1975).
Introduction
Observations of SN 1987A, but also a number of other Type II and Type Ia SNe, at late stages have made it possible to study a number of new features in the evolution of the SN ejecta from explosion to the remnant stage. Here we discuss some recent results in this evolution. A more complete review of the background physics can be found in Fransson (1993).
SN 1987A
It is now well established from the bolometric light curve that ∼ 0.07 M⊙ of 56Ni was created in SN 1987A, and that this is responsible for most of the observed emission from the SN during the first ∼ 800 days. Being based on the bolometric light curve, this is a fairly model independent conclusion.
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- Supernovae and Supernova RemnantsIAU Colloquium 145, pp. 211 - 222Publisher: Cambridge University PressPrint publication year: 1996
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