A paper on a strange supernova by Dr. Takashi Moriya was picked up by phys.org.
An unusual supernova HSC16aayt (SN 2016jiu) was discovered by the Subaru/Hyper Suprime-Cam SSP transient survey. While usual supernovae reach their peak luminosity in about a month, HSC16aayt had an unusually long rising time lasting for more than three months. It showed signatures of the interaction between supernova ejecta and dense circumstellar matter. An unusual circumstellar property of the progenitor shortly before the explosion is likely related to the unique feature of this supernova.
See the webpage of phys.org for the details.
This paper was accepted by The Astrophysical Journal [arXiv]
Takashi Moriya [personal website]