Free Access
Table 2
Model parameters for M 87.
| Parameter | Value |
|
|
|
| Mbh: black hole mass | 6 × 109 M⊙ |
| Rg: gravitational radius | 8.87 × 1014 cm |
 : jet power at z0 |
1.9 × 1046 erg s-1 |
qj: ratio  |
0.05 |
| Γb(z0): bulk Lorentz factor of the jet at z0 | 4 |
| θ: viewing angle | 30° |
| ξj: jet’s half-opening angle | 1.5° |
| qrel: jet’s content of relativistic particles | 0.05 |
| a: hadron-to-lepton power ratio | 40 |
| qm: magnetic to kinetic energy ratio at zacc | 0.35 |
| z0: jet’s launching point | 50Rg |
| zacc: injection point | 143Rg |
| Δz: size of injection zone | zacctanξj/4 = 11.5 Rg |
| B(zacc): magnetic field at zacc | 407 G |
| m: index for magnetic field dependence on z | 1.5 |
| s: injection spectral index | 2.4 |
| η: acceleration efficiency | 1.5 × 10-5 |
 : minimum proton energy |
3 GeV |
 : minimum electron energy |
65 MeV |
 : maximum primary proton energy |
9 × 106 GeV |
 : maximum primary electron energy |
25 GeV |
| NH: column dust density | 2 × 1020 cm-2 |
| nc(zacc): cold matter density inside at zacc | 3.9 × 106 cm-3 |
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.