An acceleration-radiation model for nonthermal flares from Sgr A*

Open Access

Table 2.

Model parameter values for the 2014 bright flare of Sgr A*.

Parameter	Symbol	Value
Active region radius	R	9 × 10¹² cm
Light crossing time	t_cr	304 s
Particle escape timescale	t_esc	t_cr
Particle escape timescale (II) ^(†)	$t_{esc}^{(II)}$ $t^{(\mathrm{II})}_{\mathrm{esc}}$	12.5 t_cr
Acceleration timescale	t_acc	1.5 t_esc
Duration of acceleration episode	T	16 t_cr
Magnetic field strength	B	0.8 G
Initial electron Lorentz factor	γ₀	10^2.7
Electron compactness	ℓ_e	10^−3.2
Electron injection rate at γ₀	Q₀	6.4 × 10⁴² s⁻¹

Notes.

^(†)

After the acceleration episode.

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