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Geological Isotope Anomalies as Signatures of Nearby Supernovae
John Ellis, Brian D. Fields, David N. Schramm
Nearby supernova explosions may cause geological isotope anomalies via the direct deposition of debris or by cosmic-ray spallation in the earth's atmosphere. We estimate the mass o…
Halo White Dwarfs and the Hot Intergalactic Medium
Brian D. Fields, Grant J. Mathews, David N. Schramm
We present a schematic model for the formation of baryonic galactic halos and hot gas in the Local Group and the intergalactic medium. We follow the dynamics, chemical evolution, h…
Model Independent Predictions of Big Bang Nucleosynthesis from \he4 and \li7: Consistency and Implications
Brian D. Fields, Kimmo Kainulainen, Keith A. Olive +1
We examine in detail how BBN theory is constrained, and what predictions it can make, when using only the most model-independent observational constraints. We avoid the uncertainti…
Nuclear and Gamma-ray Production by Supernova Ejecta
Brian D. Fields, Michel Casse, Elisabeth Vangioni-Flam +1
The fastest ejecta of supernova explosions propagate as a precursor to the main supernova shock wave, and can be quite energetic. The spectrum of such fast ejecta is estimated base…