Magnetar Engines in Broad-lined Type Ic Supernovae and a Unified Picture for Magnetar-powered Stripped-envelope Supernovae

作者：Jin-Ping Zhu, Bing Zhang · 发表于：The Astrophysical Journal · 年份：2026 · DOI：10.3847/1538-4357/ae84b3 · 研究领域：Gamma-ray bursts and supernovae、Pulsars and Gravitational Waves Research、Stellar, planetary, and galactic studies

Abstract We model the multiband lightcurves of 80 broad-lined Type Ic supernovae (SNe Ic-BL), including 11 associated with long-duration gamma-ray bursts (lGRBs), using a magnetar engine model with 56 Ni decay. The data are all consistent with a magnetar engine, yielding high-quality fits across the sample. The medians with 1 σ regions for key parameters are initial spin period P i ∼ 2.0 3 − 0.95 + 1.81 ms , magnetic field B p ∼ 3.9 7 − 1.42 + 3.07 × 1 0 15 G , ejecta mass M ej ∼ 2.3 0 − 1.01 + 1.46 M ⊙ , and 56 Ni mass M Ni ∼ 0.1 8 − 0.09 + 0.14 M ⊙ , with strong correlations observed for both M ej − P i (anticorrelation) and M Ni − M ej (correlation). Comparing the lGRB-associated and non-lGRB-associated samples using fitting parameters, we find no significant difference, although the lGRB-associated sample is slightly brighter, possibly due to observational bias (dimmer ones overshone by afterglow). Relative to ordinary Type Ic SNe, SNe Ic-BL have similar 56 Ni and ejecta masses, suggesting comparable pre-SN progenitor properties, with differences possibly arising from the presence of a magnetar engine that governs supernova (SN) dynamics. In comparison with other possible magnetar-powered stripped-envelope SNe (S...