The impostor revealed: SN 2016jbu was a terminal explosion
The impostor revealed: SN 2016jbu was a terminal explosion
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冒名顶替者揭秘：SN 2016jbu是终端爆炸
DOI：
10.1051/0004-6361/202244262
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发表时间：
2022
影响因子：
6.5
通讯作者：
Brennan S
中科院分区：
文献类型：
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作者：
Brennan S
在这封信中，我们介绍了哈勃太空望远镜对 5 年以上相互作用瞬态 SN 2016jbu 的最新观测结果。我们没有发现任何证据表明 SN 2016jbu 有任何额外的爆发，并且光源现在已经明显减弱，低于 2016 年初的前身星等。与最近对 SN 2009ip 和 SN 2015bh 的观测类似，SN 2016jbu 在过去两年中颜色没有发生显着变化，这表明没有持续的尘埃形成。我们发现 SN 2016jbu 的衰变速度比放射性镍的预期要慢，但比 SN 2009ip 的衰变速度快。后期光曲线显示出非线性下降，并伴随着峰值亮度后约 8 个月发生的重新增亮事件，表明 CSM 相互作用继续主导 SN 2016jbu。虽然我们的光学观测似乎与幸存的、炽热的、被尘埃笼罩的恒星一致，但这需要难以置信的大尘埃质量。这些新的观测结果表明 SN 2016jbu 是一颗真正的超新星，尽管很奇怪，我们讨论了幸存的双星伴星的可能性。
In this Letter, we present recent observations from theHubbleSpace 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.