http://arxiv.org/abs/2112.11334
In this paper, we fit the spectral energy distributions (SEDs) of a luminous rapidly evolving broad-lined Ic supernova (SN Ic-BL) iPTF 16asu, and re-construct its post-peak bolometric light curve. We find that the luminosity of the post-peak bolometric light curve of iPTF 16asu is about three times that of the pseudo-bolometric light curve derived in the literatures and the extrapolated peak luminosity can exceed $\sim 10^{44}$ erg s$^{-1}$, which is higher than the threshold of superluminous SNe (SLSNe). We then use the $^{56}$Ni model and the magnetar plus $^{56}$Ni model to fit the multi-band light curves of iPTF 16asu, and construct the theoretical light curve using the best-fitting theoretical multi-band light curves. We find that the magnetar plus $^{56}$Ni model can account for the photemetry of iPTF 16asu, and the peak luminosity of its theoretical bolometric light curve is $\sim 1.06\times 10^{44}$ erg s$^{-1}$. We suggest that iPTF 16asu and similar SNe (e.g., SN 2018gep) constitute the class of rapidly evolving SLSNe Ic-BL.
S. Wang and W. Gan
Wed, 22 Dec 21
17/67
Comments: 14 pages, 6 figures, 2 tables, submitted to ApJ
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