Besides supernovae, few astrophysical processes can release close to 1051 erg of energy. A growing number of stellar outbursts are now recognized to have energy releases matching those of faint supernovae. These transients can be triggered by various mechanisms, and their discrimination is sometimes a tricky issue.
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Acknowledgements
M.F. is supported by a Royal Society–Science Foundation Ireland University Research Fellowship. A.P. and M.F. thank their many students, collaborators and colleagues without whose ongoing collaboration this article could not have been written.
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Pastorello, A., Fraser, M. Supernova impostors and other gap transients. Nat Astron 3, 676–679 (2019). https://doi.org/10.1038/s41550-019-0809-9
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DOI: https://doi.org/10.1038/s41550-019-0809-9
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