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Table 1.
Model parameters for an NIR and X-ray flare.
| Parameter | Symbol | Value |
|---|---|---|
| Active region radius | R | 1.2 × 1013 cm (*) |
| Light crossing time | tcr | 400 s |
| Particle escape timescale | tesc | tcr |
| Acceleration timescale | tacc | 1.5 tesc |
| Duration of acceleration episode | T | 23 tacc |
| Magnetic field strength | B | 0.8 G |
| Initial electron Lorentz factor | γ0 | 102.7 |
| Electron compactness | ℓe | 10−3.5 |
| Electron injection rate at γ0 | Q0 | 3.2 × 1042 s−1 |
Notes.
(*)
R ≈ 9.5RS for a black hole mass of 4.3 × 106 M⊙ as for Sgr A⋆ (GRAVITY Collaboration 2019).
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