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Table 1.

SED model fitting parameters for three different models used (A-PL, A-BPL and B model – for models and parameters details see Sect. 4.2 and Sect. 4.3).

Model A (EHT) (5) A (HE) A (EHT/BPL) A (HE/BPL) B (EHT) B (HE) B (VHE-flare)
δ 1 1.82 1 1.82 1 1.82 2.55
R [rg] (1),(2) 5.0 10.0 5.0 10.0 5.0 10.0 20.0
n e ′ $ n_{\mathrm{e}}\prime $ [cm−3] (3) 2.0 × 106 1.7 × 101 1.8 × 106 6.6 × 101 4.0 × 105 1.6 × 103 1.5 × 101
B′ [G] 5.3 2.3 × 10−2 4.6 8.0 × 10−2 10 2.5 × 10−2 4.0 × 10−3
γmin 1 5 × 103 1 1.2 × 103 1 30 103
γbr – 7 × 106 – 7 × 106 4 × 102 3 × 105 –
γmax/106 1.0 50 0.19 45 10 100 60
p1 3.0 3.0 2.9 3.0 2.8 2.1 2.5
p2 – 2.0 – 2.0 4.5 3.15 –
Ue/UB(4) 2.9 6.7 × 103 3.6 5.2 × 102 0.18 7.6 × 103 5.8 × 104
L e [ erg s − 1 ] $ L_{e}~[\mathrm{erg~s}^{-1}] $ 2.0 × 1042 2.1 × 1042 1.9 × 1042 2.0 × 1042 1.6 × 1042 2.5 × 1042 3.7 × 1042
L poy [ erg s − 1 ] $ L_{\mathrm{poy}}~[\mathrm{erg~s}^{-1}] $ 7.0 × 1041 3.2 × 1038 5.2 × 1041 3.8 × 1039 9.0 × 1042 3.4 × 1038 6.4 × 1037

Notes.

(1)

For M87*, rg = 9.8 × 1014 cm.

(2)

Parameter pegged to the observed ring size for the EHT-oriented models and the upper limit of the allowed interval for the HE-oriented models.

(3)

The number density of total non-thermal electrons or electron/positron pairs.

(4)

The ratio of the nonthermal electron (or electron/positron pair) energy to the magnetic energy, that is derived for comparison between models.

(5)

For the EHT-MWL 2017 modelling, the inferred parameters were δ = 1, R = 5.2rg, ne′ = 3.6 × 105 cm−3, B′ = 4.7 G, γmin = 1, γmax = 3.5 × 106, p1 = 2.2, and resulting Ue/UB = 2.3, that are similar to those obtained for the EHT-oriented model A here.

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