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The impostor revealed : SN 2016jbu was a terminal explosion
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Brennan, S. J., Elias-Rosa, N., Fraser, M., Van Dyk, S. D. and Lyman, J. D. (2022) The impostor revealed : SN 2016jbu was a terminal explosion. Astronomy & Astrophysics, 664 . L18. doi:10.1051/0004-6361/202244262
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Official URL: http://dx.doi.org/10.1051/0004-6361/202244262
Abstract
In this Letter, we present recent observations from the Hubble Space Telescope of the interacting transient SN 2016jbu at +5 yr. We find no evidence for any additional outburst from SN 2016jbu, and the optical source has now faded significantly below the progenitor magnitudes from early 2016. Similar to recent observations of SN 2009ip and SN 2015bh, SN 2016jbu has not undergone a significant change in colour over the past 2 years, suggesting that there is a lack of ongoing dust formation. We find that SN 2016jbu is fading more slowly than expected of radioactive nickel, but faster than the decay of SN 2009ip. The late-time light curve displays a non-linear decline and follows on from a re-brightening event that occurred ∼8 months after peak brightness, suggesting CSM interaction continues to dominate SN 2016jbu. While our optical observations are plausibly consistent with a surviving, hot, dust-enshrouded star, this would require an implausibly large dust mass. These new observations suggest that SN 2016jbu is a genuine, albeit strange, supernova, and we discuss the plausibility of a surviving binary companion.
Item Type: | Journal Item | ||||||||||||||||||||||||
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Subjects: | Q Science > QB Astronomy | ||||||||||||||||||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||||||||||||||||||
Library of Congress Subject Headings (LCSH): | Supernovae, Stars -- Evolution, Supermassive stars, Supergiant stars, Astrophysics | ||||||||||||||||||||||||
Journal or Publication Title: | Astronomy & Astrophysics | ||||||||||||||||||||||||
Publisher: | EDP Sciences | ||||||||||||||||||||||||
ISSN: | 0004-6361 | ||||||||||||||||||||||||
Official Date: | 29 August 2022 | ||||||||||||||||||||||||
Dates: |
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Volume: | 664 | ||||||||||||||||||||||||
Article Number: | L18 | ||||||||||||||||||||||||
DOI: | 10.1051/0004-6361/202244262 | ||||||||||||||||||||||||
Status: | Peer Reviewed | ||||||||||||||||||||||||
Publication Status: | Published | ||||||||||||||||||||||||
Access rights to Published version: | Open Access (Creative Commons) | ||||||||||||||||||||||||
Date of first compliant deposit: | 19 October 2022 | ||||||||||||||||||||||||
Date of first compliant Open Access: | 20 October 2022 | ||||||||||||||||||||||||
RIOXX Funder/Project Grant: |
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