On the possibility of efficient production of electron-positron pairs near pulsars and accreting black holes

Details On the possibility of efficient production of electron-positron pairs near pulsars and accreting black holes On the possibility of efficient production of electron-positron pairs near pulsars and accreting black holes

Jun 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985azh....62..529s&link_type=abstract

(Astronomicheskii Zhurnal, vol. 62, May-June 1985, p. 529-541) Soviet Astronomy (ISSN 0038-5301), vol. 29, May-June 1985, p. 306

Astronomy and Astrophysics

Astronomy

5

Astronomical Models, Black Holes (Astronomy), Electron-Positron Pairs, Gamma Ray Spectra, Pair Production, Positron Annihilation, Pulsars, Accretion Disks, Active Galactic Nuclei, Energy Spectra, Milky Way Galaxy, Synchrotron Radiation

Scientific paper

A numerical model was constructed in order to describe the phenomenon of electron-positron (e/+/e/-/) pair production due to gamma-gamma interactions near accreting black holes and pulsars. The model is used to calculate the time-dependent particle spectra and e(+)e(-) densities assuming the reaction medium is homogeneous in initial conditions. It is shown that 10 percent of the initial energy injected into the medium in the form of hard particles can be found in the rest mass of the electrons and positrons. The photon spectrum of the e(+)e(-) pairs showing a sharp dropoff in the high energy region near 1 MeV is established. The obtained spectrum can be used to explain the annihilation gamma-ray line observed near the center of the Galaxy. The spectrum would also account for the e(+)e(-) pair production observed near accreting black holes of at least 1000 solar mass, as well as young pulsar releasing 10 to the 39th erg/s in the form of hard photons from the region of the magnetic poles. Other objects in which the development of e(+)e(-) pairs seems likely are quasars and active galactic nuclei having a nonthermal luminosity close to the Eddington limit.

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