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Possible wind velocity structure in iPTF14hls. Credit: Moriya et al., 2019.
A source known as iPTF14hls, assumed to be a Type IIP supernova, may be a long-term outﬂow similar to stellar winds, according to a new study published November 5 on arXiv.org. The new research proposes that iPTF14hls is most likely a so-called "hyper-wind"—an extreme mass outflow from a massive star.
September - Intermediate - Palomar - Transient - Factory
Discovered in September 2014 by the Intermediate Palomar Transient Factory, iPTF14hls is believed to be an unusual Type IIP supernova star that erupted continuously for about 1,000 days before becoming a remnant nebula. Given that typical Type IIP supernovae dim in about 100 days, the behavior of iPTF14hls still baffles astronomers.
Many hypotheses have been proposed that may explain the true nature of iPTF14hls. Some studies suggest that the object could be a pulsational pair-instability supernova, while some point out to a magnetar. Other scenarios taken into account are that iPTF14hls could represent a shock interaction of ejected material with dense circumstellar material or even an antimatter burning in a stellar core. However, none of the presented hypotheses fully explains all the aspects of this source.
Team - Astronomers - Takashi - J - Moriya
A team of astronomers led by Takashi J. Moriya of National Astronomical Observatory of Japan (NAOJ) has revealed their own theory. By analysing the available observational data of iPTF14hls, they found that this object may be related to an extreme, long-term mass outﬂow from a massive star rather than a violent, short-term mass ejection like...
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