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  1. Article

    Evidence for p-process nucleosynthesis recorded at the Solar System abundances

    Analyzing the Solar System abundance, we have found two universal scaling laws concerning the p- and s-nuclei with the same atomic number. They are evidence of the p-nucleus origin that has been discussed for ...

    T. Hayakawa, N. Iwamoto, T. Shizuma… in The European Physical Journal A - Hadrons … (2006)

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    Chapter and Conference Paper

    Evidence for p-process nucleosynthesis recorded at the Solar System abundances

    Analyzing the Solar System abundance, we have found two universal scaling laws concerning the p- and s-nuclei with the same atomic number. They are evidence of the p-nucleus origin that has been discussed for ...

    T. Hayakawa, N. Iwamoto, T. Shizuma… in The 2nd International Conference on Nuclea… (2006)

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    Chapter and Conference Paper

    Nucleosynthesis in Black-Hole-Forming Supernovae

    Stars more massive than ∼ 20 − 25 M⨀ form a black hole at the end of their evolution. Stars with non-rotating black holes are likely to collapse “quietly” ejecting a small amount of heavy elements (faint supernov...

    K. Nomoto, K. Maeda, H. Umeda, N. Tominaga, T. Ohkubo, J. Deng… in Cosmic Explosions (2005)

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    Article

    High-performance liquid chromatographic quantification of allysine as bis-p-cresol derivative in elastin

    The first step in normal cross-linking in elastin is the formation of α-aminoadipic-δ-semialdehyde, allysine, through oxidative deamination of specific peptidyl lysine by the enzyme lysyl oxidase (EC 1.4.3.13). ...

    H. Umeda, K. Kawamorita, K. Suyama in Amino Acids (2001)

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    Chapter

    Yields from Type Ia Supernovae

    Supernovae of both types represent the most important nucleosynthesis contributors to galactic evolution and SNe la represent the major source of Fe-group nuclei. Our theoretical understanding is still burdene...

    F.-K. Thielemann, F. Brachwitz, K. Nomoto, H. Umeda… in The Evolution of The Milky Way (2000)

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    Chapter and Conference Paper

    Nucleosynthesis in Type II Supernovae and Abundance Trends of Iron-Peak Elements in Metal-Poor Stars

    Recent high-resolution abundance surveys show interesting trends of [Cr/Fe], [Mn/Fe], and [Co/Fe] with [Fe/H]. Both [Cr/Fe] and [Mn/Fe] decrease as metallicity declines from [Fe/H] = −2.4 to −4.0, while [Co/Fe...

    Takayoshi Nakamura, H. Umeda, K. Nomoto… in Numerical Astrophysics (1999)

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    Article

    An unusual supernova in the error box of the γ-ray burst of 25 April 1998

    The discovery of afterglows associated with γ-ray bursts at X-ray1, optical2 and radio3 wavelengths and the measurement of the redshifts of some of these events4,5 has established that γ-ray bursts lie at extreme...

    T. J. Galama, P. M. Vreeswijk, J. van Paradijs, C. Kouveliotou, T. Augusteijn… in Nature (1998)

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    Article

    A hypernova model for the supernova associated with the γ-ray burst of 25 April 1998

    The discovery of the unusual supernova SN1998bw, and its possible association with the γ-ray burst GRB 9804251,2,3, provide new insights into the explosion mechanism of very massive stars and the origin of some c...

    K. Iwamoto, P. A. Mazzali, K. Nomoto, H. Umeda, T. Nakamura, F. Patat… in Nature (1998)