Open Access
Table D.1.
Summary of emission and acceleration scenarios considered.
| Model | Emission mechanism | |||||
|---|---|---|---|---|---|---|
| Jet orientation | Jet speed | Jet length | Acceleration region | Origin of morphology | issues if leptonic | issues if hadronic |
| aligned with l.o.s. | relativistic | > 300 pc | near black hole | advection in jet | energy in jet cocoon very large (Equation 1) | energy in jet cocoon very large |
| beaming should hide counter-jet (Table 1) | beaming should hide counter-jet | |||||
| requires weak magnetic field (B≲3 μG) | energy in protons very large (but | |||||
| benefits from beaming) | ||||||
| proton confinement | ||||||
| aligned with l.o.s. | relativistic | < 300 pc | in lobes/cocoon | filled lobes | energy in jet cocoon very large (Equation 1) | energy in filled cocoon very large |
| lobe size ≈100 pc | requires weak magnetic field (B≲3 μG) | energy in protons very large | ||||
| proton confinement | ||||||
| aligned with l.o.s. | relativistic | any | near black hole | escape from jets and diffusion | unclear what creates special environment | unclear what creates special environment |
| or further out in jet | into special environment | unclear what determines source size | unclear what determines source size | |||
| requires fine-tuning diffusion (B ≲ 3 μG) | requires fine-tuning diffusion (B≳100 μG) | |||||
| energy in protons very large | ||||||
| proton confinement | ||||||
| perpendicular (hidden jet) | at least mildly relativistic | (30-70)(sin ϕ)−1 pc | near black hole | advection in jet | requires weak magnetic field (B≲3 μG) | energy in protons very large |
| radiative cooling at acceleration site | proton confinement | |||||
| perpendicular (hidden jet) | at least mildly relativistic | (30-70)(sin ϕ)−1 pc | further out in jet | slow advection within cocoon | requires weak magnetic field (B≲3 μG) | energy in protons very large |
| radiative cooling at acceleration site | proton confinement | |||||
| cooling faster than transport | ||||||
| perpendicular (hidden jet) | at least mildly relativistic | < (30-70)(sin ϕ)−1 pc | further out in jet | diffusion | requires weak magnetic field (B≲3 μG) | energy in protons very large |
| proton confinement | ||||||
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