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| Paper: |
Relativistic Parker's Wind with an Extended Polytropic Equation of State |
| Volume: |
290, Active Galactic Nuclei: from Central Engine to Host Galaxy |
| Page: |
115 |
| Authors: |
Meliani, Z.; Sauty, C. |
| Abstract: |
We have explored a new relativistic extension of the classical polytropic equation of state to study Parker-type winds, with a polytropic index going from isothermal to adiabatic. Our assumption allows us to have a plasma with both a high ultra relativistic temperature profile at the base of the corona and a classical lower temperature in the outer region. The model also includes the relativistic effects of the Black Hole metric. As a result, relativistic effects both in the temperature and in the metrics seems to favor the acceleration of the wind. The classical constraint on the polytropic index that should be less than 3/2 is less severe in the frame of relativistic winds. As a consequence, coronae with relativistic temeratures in the central part of AGNs are likely to be able to accelerate the plasma to high relativistic speeds. This may be an alternative or a strong supply to the usual magnetocentrifugal acceleration invoked for the formation of relativistic jets. |
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