2016ApJ...828...87W -
Astrophys. J., 828, 87-87 (2016/September-2)
A triple-energy-source model for superluminous supernova iPTF13ehe.
WANG S.Q., LIU L.D., DAI Z.G., WANG L.J. and WU X.F.
Abstract (from CDS):
Almost all superluminous supernovae (SLSNe) whose peak magnitudes are \lesssim -21 mag can be explained by the ^56Ni-powered model, the magnetar-powered (highly magnetized pulsar) model, or the ejecta-circumstellar medium (CSM) interaction model. Recently, iPTF13ehe challenged these energy-source models, because the spectral analysis shows that ∼2.5{M}_☉ of ^56Ni have been synthesized, but are inadequate to power the peak bolometric emission of iPTF13ehe, while the rebrightening of the late-time light curve (LC) and the Hα emission lines indicate that the ejecta-CSM interaction must play a key role in powering the late-time LC. Here we propose a triple-energy-source model, in which a magnetar together with some amount (\lesssim 2.5{M}_☉) of ^56Ni may power the early LC of iPTF13ehe, while the late-time rebrightening can be quantitatively explained by an ejecta-CSM interaction. Furthermore, we suggest that iPTF13ehe is a genuine core-collapse supernova rather than a pulsational pair-instability supernova candidate. Further studies on similar SLSNe in the future would eventually shed light on their explosion and energy-source mechanisms.
Abstract Copyright:
© 2016. The American Astronomical Society. All rights reserved.
Journal keyword(s):
stars: magnetars - supernovae: general - supernovae: individual: iPTF13ehe - supernovae: individual: iPTF13ehe
Simbad objects:
3
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