Magnetar Engines in Broad-lined Type Ic Supernovae and a Unified Picture for Magnetar-powered Stripped-envelope Supernovae
Jin-Ping Zhu, Bing Zhang

TL;DR
This study models 80 broad-lined Type Ic supernovae with magnetar engines, finding consistent parameters and correlations, and proposes a unified framework for magnetar-powered supernovae types based on observational data.
Contribution
It provides a comprehensive analysis of magnetar parameters in SNe Ic-BL and introduces a unified classification scheme for magnetar-powered stripped-envelope supernovae.
Findings
Magnetar engine models fit all SNe Ic-BL data well.
Strong correlations between ejecta mass and initial spin period, and between nickel mass and ejecta mass.
Similar properties between SNe Ic-BL and SLSNe Ic suggest a common origin.
Abstract
We model the multi-band lightcurves of 80 SNe Ic-BL, including 11 associated with lGRBs, using a magnetar engine model with Ni decay. We find that the data are all consistent with a magnetar central engine, and such a model yields high-quality fits across the sample. The medians with regions of the key parameters are , , , and , with strong and statistically significant correlations observed for both (anti-correlation) and (correlation). Comparing the SN Ic-BL samples with and without lGRB association using fitting parameters, we find no significant difference between them, although the GRB-associated sample is slightly…
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