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Astrophysical reaction rate for Be by photodisintegration
K. Sumiyoshi, H. Utsunomiya, S. Goko +1
We study the astrophysical reaction rate for the formation of Be through the three body reaction . This reaction is one of the key reactions which could bridge the m…
Disappearing Dark Matter in Brane World Cosmology: New Limits on Noncompact Extra Dimensions
K. Ichiki, P. M. Garnavich, T. Kajino +2
We explore cosmological implications of dark matter as massive particles trapped on a brane embedded in a Randall-Sundrum noncompact higher dimension space. It is an unavoi…
r-Process Abundance Universality and Actinide Cosmochronology
Kaori Otsuki, Grant J. Mathews, Toshitaka Kajino
We review recent observational and theoretical results concerning the presence of actinide nuclei on the surfaces of old halo stars and their use as an age determinant. We present…
R-Process Nucleosynthesis In Neutrino-Driven Winds From A Typical Neutron Star With M = 1.4 Msun
M. Terasawa, K. Sumiyoshi, S. Yamada +2
We study the effects of the outer boundary conditions in neutrino-driven winds on the r-process nucleosynthesis. We perform numerical simulations of hydrodynamics of neutrino-drive…
Chemical composition of carbon-rich, very metal-poor subgiant LP625-44 observed with the Subaru/HDS
W. Aoki, H. Ando, S. Honda +14
We have obtained a high resolution (R~90,000) spectrum of the carbon- and s-process-element-rich, very metal-poor ([Fe/H]=-2.7) subgiant LP625-44, as well as that of HD140283 (a me…
Constraints on Neutrino Degeneracy from the Cosmic Microwave Background and Primordial Nucleosynthesis
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 based upon the latest high resolution CMB sky maps from BOOME…