4 papers · 1 filter
Solar Flares: Gamma Rays
Reuven Ramaty, Natalie Mandzhavidze
We briefly review the theory of gamma ray production in solar flares and present the highlights of the observations and their implications. Specifically: (i) the gamma ray data sho…
Early Galactic Li, Be and B: Implications on Cosmic Ray Origin
Reuven Ramaty, Richard Lingenfelter
Be abundances of old, low metallicity halo stars have major implications on cosmic-ray origin, requiring acceleration out of fresh supernova ejecta. The observed, essentially const…
LiBeB and the Origin of Cosmic Rays
Reuven Ramaty, Richard Lingenfelter, Benzion Kozlovsky
Be abundances at low metallicities have major implications on cosmic ray origin, requiring acceleration out of fresh supernova ejecta. The observed, essentially constant Be/Fe fixe…
Testing the Primary Origin of Be and B in the Early Galaxy
Elisabeth Vangioni-Flam, Reuven Ramaty, Keith A. Olive +1
Two types of models have been proposed to explain the linear rise of the Be and B abundances as a function of iron observed in metal poor halo stars. In both cases, this linearity…