On the electric current distribution in Poynting-dominated outflows
نویسندگان
چکیده
منابع مشابه
GRBs from unstable Poynting dominated outflows
Poynting flux driven outflows from magnetized rotators are a plausible explanation for gamma-ray burst engines. We suggest a new possibility for how such outflows might transfer energy into radiating particles. We argue that the Poynting flux drives nonlinearly unstable large amplitude electromagnetic waves (LAEMW) which “break” at radii rt ∼ 10 cm where the MHD approximation becomes inapplicab...
متن کاملPoynting-flux powered GRB outflows: spectral predictions
Production of the gamma-ray spectrum of a Poynting-flux dominated GRB outflow is investigated. The very high magnetic field strengths (super-equipartition) in such a flow lead to very efficient synchrotron emission. In contrast with internal shocks, dissipation of magnetic energy by reconnection is gradual and does not produce the spectrum of cooling electrons associated with shock acceleration...
متن کاملSpectra of Poynting-flux powered GRB outflows
We investigate the production of the gamma-ray spectrum of a Poynting-flux dominated GRB outflow. The very high magnetic field strengths (super-equipartition) in such a flow lead to very efficient synchrotron emission. In contrast with internal shocks, dissipation of magnetic energy by reconnection is gradual and does not produce the spectrum of cooling electrons associated with shock accelerat...
متن کاملAsymptotic structure of Poynting dominated jets
In relativistic, Poynting dominated outflows, acceleration and collimation are intimately connected. An important point is that the Lorentz force is nearly compensated by the electric force therefore the acceleration zone spans a large range of scales. We derived the asymptotic equations describing relativistic, axisymmetric MHD flows far beyond the light cylinder. These equations do not contai...
متن کاملAre quasar jets dominated by Poynting flux?
The formation of relativistic astrophysical jets is presumably mediated by magnetic fields threading accretion disks and central, rapidly rotating objects. As it is accelerated by magnetic stresses, the jet’s kinetic energy flux grows at the expense of its Poynting flux. However, it is unclear how efficient is the conversion from magnetic to kinetic energy and whether there are any observationa...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1997
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/285.3.604