103 citations · 265 across the 6 of their papers we have counts for
5 papers
The Galactic Spatial Distribution of OB Associations and Their Surrounding Supernova-Generated Superbubble
J. C. Higdon, R. E. Lingenfelter
Core collapse supernovae of massive (> 8 Mo) stars are formed primarily in OB associations and help blow giant superbubbles, where their collective shocks accelerate most of the Ga…
Is There a Dark Matter Signal in the Galactic Positron Annihilation Radiation?
R. E. Lingenfelter, J. C. Higdon, R. E. Rothschild
Assuming Galactic positrons do not go far before annhilating, a difference between the observed 511 keV annihilation flux distribution and that of positron production, expected fro…
The Galactic Positron Annihilation Radiation & The Propagation of Positrons in the Interstellar Medium
J. C. Higdon, R. E. Lingenfelter, R. E. Rothschild
We consider positron propagation in the interstellar medium and show that the positrons from the beta-plus decay chains of the radioactive nuclei Ni-56, Ti-44, and Al-26, produced…
The Galactic 26Al Problem and The Close Binary SNIb/c Solution?
J. C. Higdon, R. E. Lingenfelter, R. E. Rothschild
The origin of the long-lived radioactive 26Al, which has been observed in the Galactic interstellar medium from its 1.809 MeV decay gamma-ray line emission, has been a persistent p…
Cosmic Ray Acceleration in Superbubbles and the Composition of Cosmic Rays
R. E. Lingenfelter, J. C. Higdon, R. Ramaty
We review the evidence for cosmic ray acceleration in the superbubble/hot phase of the interstellar medium, and discuss the implications for the composition of cosmic rays and the…