JWST/MIRI detects the dusty SN1993J about 30 years after explosion

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Table 2.

Parameters of the best-fit two-component (cold amC dust + hot BB) models for the day 5359 Spitzer and the day 11 280 JWST/MIRI SED of SN 1993J. Both models were calculated using κ files from Sarangi (2022).

Data	Epoch	T_cold	M_cold	L_cold	R_BB, cold	T_BB, warm
	(days)	(K)	(10⁻³ M_⊙)	(10³⁸ erg s⁻¹)	(10¹⁶ cm)	(K)
Spitzer (3.6–8.0 + 24 μm)	5359	167 ± 4	14.3 ± 2.9	10.0	2.9	901 ± 52

JWST (7.7, 10.0, 15.0, 21.0 μm)	11 280	116 ± 10	8.9 $_{- 2.3}^{+ 4.5}$ $^{+4.5}_{-2.3}$	1.0	1.3	430 $_{- 50}^{+ 150}$ $^{+150}_{-50}$
		128 ± 2	5.2 ± 0.5	–	–	1000 (fixed)

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