Fast Magnetic Reconnection Structures in Poynting Flux-dominated Jets
نویسندگان
چکیده
Abstract The ubiquitous relativistic jet phenomena associated with black holes play a major role in high and very-high-energy (VHE) astrophysics. In particular, observations have demonstrated that blazars show VHE emission time variability from days to minutes (in the gigaelectronvolt teraelectronvolt bands), implying very compact regions. real mechanism of particle acceleration process responsible for this is still being debated, but magnetic reconnection has lately been discussed as strong potential candidate. work, we present results three-dimensional special magnetohydrodynamic simulations development events driven by turbulence induced current-driven kink instability along jet. We performed systematic identification all regions system, characterizing their local field topology quantifying rates. obtained average rates 0.051 ± 0.026 units Alfvén speed), which are comparable predictions theory turbulence-induced fast reconnection. A detailed statistical analysis also follow log-normal distribution, signature its turbulent origin. To probe robustness our method, applied blazar Mrk 421. Building synthetic light curve integrated power, evaluated power spectral density analysis, obtaining good agreement band. This suggests can be possible behind high-energy observed blazars.
منابع مشابه
Are 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 کاملThe role of kink instability in Poynting-flux dominated jets
The role of kink instability in magnetically driven jets is explored through numerical one-dimensional steady relativistic MHD calculations. The instability is shown to have enough time to grow and influence the dynamics of Poynting-flux dominated jets. In the case of AGN jets, the flow becomes kinetic flux dominated at distances > ∼ 1000rg because of the rapid dissipation of Poynting flux. Whe...
متن کاملAre Quasar Jets Matter or Poynting Flux Dominated?
If quasar jets are accelerated by magnetic fields but terminate as matter dominated, where and how does the transition occur between the Poynting-dominated and matter-dominated regimes? To address this question, we study constraints which are imposed on the jet structure by observations at different spatial scales. We demonstrate that observational data are consistent with a scenario where the ...
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 کاملFast magnetic reconnection in the plasmoid-dominated regime.
A conceptual model of resistive magnetic reconnection via a stochastic plasmoid chain is proposed. The global reconnection rate is shown to be independent of the Lundquist number. The distribution of fluxes in the plasmoids is shown to be an inverse-square law. It is argued that there is a finite probability of emergence of abnormally large plasmoids, which can disrupt the chain (and may be res...
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: The Astrophysical Journal
سال: 2021
ISSN: ['2041-8213', '2041-8205']
DOI: https://doi.org/10.3847/1538-4357/abee7a