Table of Contents
ISRN Astronomy and Astrophysics
Volume 2012, Article ID 848476, 6 pages
Research Article

Long-Lived Positronium and AGN Jets

1Department of Physics, Kenyon College, Gambier, OH 43022, USA
2Perimeter Institute for Theoretical Physics, 31 Caroline Street North, Waterloo, ON, Canada N2L 2Y5
3Department of Physics, Case Western Reserve University, Cleveland, OH 44106, USA
4Department of Physics, College of the Holy Cross, Worcester, MA 01610, USA
5ITAMP, Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA

Received 6 August 2012; Accepted 27 August 2012

Academic Editors: M. Ding and R. N. Henriksen

Copyright © 2012 John T. Giblin and Janine Shertzer. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


We suggest that stable states of positronium might exist in the jets of active galactic nuclei (AGN). Electrons and positrons are created near the accretion disks of supermassive black holes at the centers of AGN and are accelerated along magnetic field lines while within the Alfvèn radius. The conditions in this region are ideal for the creation of bound states of positronium which are stable against annihilation. Traveling at relativistic speeds along the jet, the helical magnetic field enables the atoms to survive for great distances.