A novel mechanism of the formation of electron-positron outflow from hot accretion disks

Yamasaki, Tatsuya; Takahara, Fumio; Kusunose, Masaaki
April 2000
AIP Conference Proceedings;2000, Vol. 510 Issue 1, p430
Academic Journal
We propose a mechanism of the relativistic jet formation in active galactic nuclei and galactic black hole binaries. We consider the ejection of electron-positron pairs produced in the two-temperature accretion disks, by solving the pair momentum equation in the one-zone approximation, in which we assume that the electron-positron component can escape independently of the electron-proton one which forms a hydrostatic atmosphere. The results show that, in the inner region of the disks, when the mass accretion rate becomes larger than about a tenth of the Eddington rate, most of the viscously dissipated energy is converted into the thermal and kinetic energy of the ejected electron-positron pairs. The produced pairs are accelerated in the vertical direction by its own gas pressure rather than by the radiative force. Thus, this mechanism is successful in extracting accretion power to form powerful electron-positron jets as suggested by recent observations. © 2000 American Institute of Physics.


Related Articles

  • The interaction of two nonplanar solitary waves in electron-positron-ion plasmas: An application in active galactic nuclei. EL-Labany, S. K.; EL-Shamy, E. F.; Sabry, R.; Khedr, D. M. // Physics of Plasmas;Jan2013, Vol. 20 Issue 1, p012105 

    In the present research paper, the effect of bounded nonplanar (cylindrical and spherical) geometry on the interaction between two nonplanar electrostatic solitary waves (NESWs) in electron-positron-ion plasmas has been studied. The extended Poincaré-Lighthill-Kuo method is used to obtain...

  • Kinetic theory for radiation interacting with sound waves in ultrarelativistic pair plasmas. Marklund, Mattias; Shukla, Padma K.; Stenflo, Lennart // Physics of Plasmas;Oct2006, Vol. 13 Issue 10, p104505 

    A kinetic theory for radiation interacting with sound waves in an ultrarelativistic electron-positron plasma is developed. It is shown that the effect of a spatial spectral broadening of the electromagnetic pulse is to introduce a reduction of the growth rates for the decay and modulational...

  • Pulsar geometrodynamics: Limitations for the gamma-ray radiation. da Costa, Anto´nio A.; Diver, Declan A. // AIP Conference Proceedings;2001, Vol. 558 Issue 1, p823 

    Following the strict single particle approach, when collective effects are not considered, electron-positron plasma flow in pulsar magnetospheres may reach very high energies, and therefore become quasi-classical as charged particles have stochastic trajectories due to the radiation of very high...

  • The diffraction mechanism of electron—positron pair photoproduction. Akhiezer, A. I.; Merenkov, N. P. // Journal of Experimental & Theoretical Physics;Dec97, Vol. 85 Issue 6, p1070 

    We examine a mechanism of electron-positron pair photoproduction near a giant resonance. The mechanism is based on the possibility of photons being absorbed by nuclei. Our calculations set the cross section of this process at roughly 10[sup -30] cm². We also discuss the feasibility of...

  • Effects of New Neutral Currents at Linear Electron—Positron Colliders. Pankov, A. A. // Physics of Atomic Nuclei;Mar2002, Vol. 65 Issue 3, p521 

    Effects that are induced by contact four-fermion interactions in the processes e[sup +]e[sup -] → μ[sup +]/μ[sup -], &bmacr;b, and &cmacr;c at √s = 0.5 TeV linear electron-positron colliders are investigated for the case of longitudinally polarized initial beams. This analysis...

  • SPEAR shows electron-muon pair produced unexpectedly. B.G.L. // Physics Today;Oct75, Vol. 28 Issue 10, p17 

    Focuses on experiment which showed a production of one electron and muon caused by the collision of electron and positron. Description of the experiment; Properties of the events; Information on other experiments on the production of muons.

  • Antiatoms: Here today... Freedman, David H. // Discover;Jan1997, Vol. 18 Issue 1, p74 

    Looks at experimental efforts on the production of atoms of antihydrogen. Production of positrons; Combination of antiproton and antielectron; Rarity of antimatter; Trapping of antiprotons with magnets.

  • H II Regions and Radio Visibility of Quasar Nuclei. Matveenko, L. I. // Astronomy Letters;Nov2001, Vol. 27 Issue 11, p686 

    The core (injector) and the jet (relativistic plasma outflow) of AGN objects are surrounded by an ionized medium, an H II region observed in emission lines. The synchrotron radiation from the core and the jet is observed through a thin screen that cocoons the structure under consideration. The...

  • An Active Galactic Nucleus as a Massive Coaxial Pulsar: A Massive Central Object with a Keplerian Accretion Disk and Twisted MHD Jet. Istomin, Ya. N.; Komberg, B. V. // Astronomy Reports;Oct2001, Vol. 45 Issue 10, p755 

    The similarities in certain empirical relations derived for active galactic nuclei (AGN) and radio pulsars support the idea that the energy release in the jets of AGN is electrodynamical, associated with the presence of a massive central object (MCO) and circumnuclear, magnetized Keplerian disk....


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics