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A type Ia supernova at the heart of superluminous transient SN 2006gy
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A type Ia supernova at the heart of superluminous transient SN 2006gy
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Journal Article
A type Ia supernova at the heart of superluminous transient SN 2006gy
2020
Overview
Superluminous supernovae radiate up to 100 times more energy than normal supernovae. The origin of this energy and the nature of the stellar progenitors of these transients are poorly understood. We identify neutral iron lines in the spectrum of one such supernova, SN 2006gy, and show that they require a large mass of iron (≳0.3 solar masses) expanding at 1500 kilometers per second. By modeling a standard type Ia supernova hitting a shell of circumstellar material, we produce a light curve and late-time iron-dominated spectrum that match the observations of SN 2006gy. In such a scenario, common envelope evolution of a progenitor binary system can synchronize envelope ejection and supernova explosion and may explain these bright transients.
Publisher
American Association for the Advancement of Science,The American Association for the Advancement of Science
Subject
