Las Cumbres Observatory | 2017 Nov 08
Supernova Discovery Challenges Known Theories of the Death of StarsSupernovae, the explosions of stars, have been observed in the thousands and in all cases they marked the death of a star. Astronomers at Las Cumbres Observatory have discovered a remarkable exception - a star that exploded multiple times over a period of more than fifty years. Their observations are challenging existing theories on these cosmic catastrophes.
When the supernova, named iPTF14hls, was discovered in September of 2014 by the Palomar Transient Factory, it looked like an ordinary supernova. Several months later, LCO astronomers noticed something that they had never seen before - the supernova was growing brighter again after it had faded.
A normal supernova rises to peak brightness and fades over 100 days. Supernova iPTF14hls, on the other hand, grew brighter and dimmer at least five times over three years.
When astronomers went back and looked at archival data, they were astonished to find evidence of an explosion in 1954 at the same location. This star somehow survived that explosion and exploded again in 2014. ...
Astronomers Discover a Star That Would Not Die
W. M. Keck Observatory | 2017 Nov 08
A Star That Would Not Die
University of California, Santa Barbara | 2017 Nov 08
Star exploded, survived, and exploded again more than 50 years later
Carnegie Institution for Science | 2017 Nov 08
Energetic eruptions leading to a peculiar hydrogen-rich explosion of a massive star - Iair Arcavi et al
- Nature 551(7679):210 (09 Nov 2017) DOI: 10.1038/nature24030