10 papers
Early Star Formation and Chemical Evolution in Proto-Galactic Clouds
Lamya Saleh, Timothy C. Beers, Grant J. Mathews
We present numerical simulations to describe the evolution of pre-Galactic clouds in a model which is motivated by cold dark matter simulations of hierarchical galaxy formation. We…
s-Process Nucleosynthesis in Low-Metallicity Stars
Nobuyuki Iwamoto, Toshitaka Kajino, Grant J. Mathews +2
We have made a parametric study of s-process nucleosynthesis in the metal poor ([Fe/H]=-2.7) stars LP625-44 and LP706-7. We find that a high neutron exposure and a small overlap fa…
Comment on "Can there be a quark-matter core in a magnetar?"
In-Saeng Suh, G. J. Mathews, F. Weber
We comment on the paper by Tanusri Ghosh and Somenath Chakrabarty, Phys. Rev. D63, 043006 (2001). In that paper it was argued that a first-order transition to quark matter in the c…
Impact of Few-Body Reactions on Explosive Nucleosynthesis: The Big-Bang and Supernovae
Toshitaka Kajino, Kaori Otsuki, Shin-ya Wanajo +2
We study the few body reactions in explosive nucleosynthesis of light-to-heavy mass elements in various astrophysical conditions. In neutrino-driven winds of gravitational core col…
Neutrino Degeneracy and Decoupling: New Limits from Primordial Nucleosynthesis and the Cosmic Microwave Background
M. Orito, T. Kajino, G. J. Mathews +1
We reanalyze the cosmological constraints on the existence of a net universal lepton asymmetry and neutrino degeneracy. We show that neutrinos can begin to decouple at higher tempe…
A Search for Sub-TeV Gammas in Coincidence with Gamma Ray Bursts
J. Poirier, C. D'Andrea, P. C. Fragile +3
We report on a study of sub-TeV ( GeV) gamma-ray-induced muon secondaries in coincidence with BATSE gamma ray bursts (GRBs). Each TeV gamma ray striking the atmosphere pro…