Journal
ASTROPHYSICAL JOURNAL
Volume 931, Issue 2, Pages -Publisher
IOP Publishing Ltd
DOI: 10.3847/1538-4357/ac6bec
Keywords
-
Categories
Funding
- JSPS KAKENHI [JP17H06363, JP19H00694, JP20H00158, JP20H00179, JP21H04997, JP21J00825, JP21K13964, JP18K13585, JP20H00174, JP21K13966]
- Graduate Program on Physics for the Universe (GP-PU), Tohoku University
Ask authors/readers for more resources
In this study, constraints on the explosion timescale of core-collapse supernovae are derived based on the synthesis of Ni-56. The analysis of multiband light curves of 82 stripped-envelope supernovae reveals that an explosion timescale shorter than 0.3 seconds can explain the majority of observed Ni-56 masses. This finding is supported by hydrodynamics and nucleosynthesis calculations.
The explosion mechanism of core-collapse supernovae is not fully understood yet. In this work, we give constraints on the explosion timescale based on Ni-56 synthesized by supernova explosions. First, we systematically analyze multiband light curves of 82 stripped-envelope supernovae (SESNe) to obtain bolometric light curves, which is among the largest samples of the bolometric light curves of SESNe derived from the multiband spectral energy distribution. We measure the decline timescale and the peak luminosity of the light curves and estimate the ejecta mass (M (ej)) and Ni-56 mass (M (Ni)) to connect the observed properties with the explosion physics. We then carry out one-dimensional hydrodynamics and nucleosynthesis calculations, varying the progenitor mass and the explosion timescale. From the calculations, we show that the maximum Ni-56 mass that Ni-56-powered SNe can reach is expressed as M (Ni) less than or similar to 0.2 M (ej). Comparing the results from the observations and the calculations, we show that the explosion timescale shorter than 0.3 s explains the synthesized Ni-56 mass of the majority of the SESNe.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available