The enigmatic double-peaked stripped-envelope SN 2023aew

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Volume 689 (September 2024)

A&A, 689 (2024) A182

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Table 3.

Scores and median posterior values of free parameters in our MOSFiT fits.

Parameter	⁵⁶Ni decay, first peak	⁵⁶Ni decay	Magnetar	CSI (s = 0)	CSI (s = 2)	Fallback
log n_H, host (cm⁻²)	$19 . 1_{- 1.8}^{+ 1.4}$ $19.1^{+1.4}_{-1.8}$	$20 . 78_{- 0.07}^{+ 0.06}$ $20.78^{+0.06}_{-0.07}$	$20 . 5_{- 0.4}^{+ 0.2}$ $20.5^{+0.2}_{-0.4}$	$19 . 5_{- 1.7}^{+ 0.9}$ $19.5^{+0.9}_{-1.7}$	21.17 ± 0.04	$21 . 01_{- 0.10}^{+ 0.07}$ $21.01^{+0.07}_{-0.10}$
t_expl (d)	−3.9 ± 0.3	−3.7 ± 0.3	−6.0 ± 0.4	$- 10 . 5_{- 1.2}^{+ 1.5}$ $-10.5^{+1.5}_{-1.2}$	$- 6 . 9_{- 1.3}^{+ 1.0}$ $-6.9^{+1.0}_{-1.3}$	−3.2 ± 0.4
log T_min (K)	3.60 ± 0.02	3.85 ± 0.01	3.82 ± 0.01	3.80 ± 0.01	3.91 ± 0.01	3.89 ± 0.02
log M_ej (M_⊙)	$0 . 53_{- 0.17}^{+ 0.21}$ $0.53^{+0.21}_{-0.17}$	−0.06 ± 0.02	0.77 ± 0.02	$- 0 . 96_{- 0.03}^{+ 0.06}$ $-0.96^{+0.06}_{-0.03}$	$- 0 . 88_{- 0.08}^{+ 0.11}$ $-0.88^{+0.11}_{-0.08}$	$1 . 35_{- 0.17}^{+ 0.11}$ $1.35^{+0.11}_{-0.17}$
v_ej (km s⁻¹)	$11 900_{- 1000}^{+ 1200}$ $11\,900^{+1200}_{-1000}$	$11 910_{- 130}^{+ 70}$ $11\,910^{+70}_{-130}$	10 200 ± 400	9000 ± 400	$9700_{- 800}^{+ 500}$ $9700^{+500}_{-800}$	$11 700_{- 400}^{+ 200}$ $11\,700^{+200}_{-400}$
log f_Ni	−1.2 ± 0.2	$- 0 . 01_{- 0.02}^{+ 0.01}$ $-0.01^{+0.01}_{-0.02}$	–	–	–	–
κ (cm² g⁻¹)	$0 . 14_{- 0.05}^{+ 0.04}$ $0.14^{+0.04}_{-0.05}$	$0 . 197_{- 0.004}^{+ 0.002}$ $0.197^{+0.002}_{-0.004}$	$0 . 197_{- 0.003}^{+ 0.002}$ $0.197^{+0.002}_{-0.003}$	–	–	$0 . 08_{- 0.02}^{+ 0.04}$ $0.08^{+0.04}_{-0.02}$
log κ_γ (cm² g⁻¹)	1.4 ± 1.6	$- 0 . 996_{- 0.003}^{+ 0.005}$ $-0.996^{+0.005}_{-0.003}$	$- 0 . 986_{- 0.010}^{+ 0.016}$ $-0.986^{+0.016}_{-0.010}$	–	–	–
P_spin (ms)	–	–	14.6 ± 1.7	–	–	–
B_⊥ (10¹⁴ G)	–	–	$20_{- 7}^{+ 18}$ $20^{+18}_{-7}$	–	–	–
M_NS (M_⊙)	–	–	$2 . 2_{- 0.3}^{+ 0.2}$ $2.2^{+0.2}_{-0.3}$	–	–	–
θ_PB (rad)	–	–	$0 . 46_{- 0.22}^{+ 0.20}$ $0.46^{+0.20}_{-0.22}$	–	–	–
log R₀ (AU)	–	–	–	$0 . 87_{- 0.85}^{+ 0.55}$ $0.87^{+0.55}_{-0.85}$	$1 . 35_{- 0.28}^{+ 0.42}$ $1.35^{+0.42}_{-0.28}$	–
log M_CSM (M_⊙)	–	–	–	0.32 ± 0.02	$0 . 33_{- 0.05}^{+ 0.12}$ $0.33^{+0.12}_{-0.05}$	–
log ρ (cm⁻³)	-	–	–	−12.18 ± 0.04	$- 11 . 50_{- 0.66}^{+ 0.50}$ $-11.50^{+0.50}_{-0.66}$	–
log t_tr	–	–	–	–	–	$- 3 . 3_{- 0.5}^{+ 0.6}$ $-3.3^{+0.6}_{-0.5}$
log L₁	–	–	–	–	–	53.65 ± 0.05

Score (log Z)	57.1	305.9	438.7	370.0	355.1	396.5

Notes. Model fits correspond to the second peak unless specified. Note that the score is affected by the number of data points, and the fit to the first peak should not be compared to other scores.

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