184 citations · 862 across the 25 of their papers we have counts for
25 papers
The Origin of Cosmic Rays: How Their Composition Defines Their Sources and Sites, and the Processes of Their Mixing, Injection and Acceleration
Richard E. Lingenfelter
Galactic cosmic-ray source compositions, (Z/H)GCRS from H to Pb and ~10^8 - 10^14 eV, differ from solar-local interstellar, (Z/H)SS or (Z/H)ISM by ~20-200x. Both are mostly just mi…
Cosmic rays from supernova remnants and superbubbles
Richard E. Lingenfelter
Recent high energy gamma-ray observations of both single supernova remnants and superbubbles, together with observations of supernovae, star formation regions, and local cosmic ray…
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…
Superbubble Origin of Cosmic Rays
Richard E. Lingenfelter
After a hundred years of searching for the origin of cosmic rays, where and how they are made has finally become clear. Here we briefly trace that odyssey through both astronomical…
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…