scholarly journals Influence of Axisymmetrically Deformed Explosions in Type II Supernovae on the Reproduction of the Solar System Abundances

1999 ◽  
Vol 511 (1) ◽  
pp. 341-350 ◽  
Author(s):  
Shigehiro Nagataki
Keyword(s):  
Solar System ◽  
Type Ii ◽  
Solar System Abundances

scholarly journals Role of Core-collapse Supernovae in Explaining Solar System Abundances ofpNuclides

2018 ◽  
Vol 854 (1) ◽  
pp. 18 ◽  
Author(s):  
C. Travaglio ◽  
T. Rauscher ◽  
A. Heger ◽  
M. Pignatari ◽  
C. West
Keyword(s):  
Solar System ◽  
Core Collapse ◽  
Solar System Abundances

scholarly journals Stark broadening of stellar Pt II lines

1994 ◽  
Vol 162 ◽  
pp. 337-338
Author(s):  
Milan S. Dimitrijević
Keyword(s):  
Solar System ◽  
Stark Broadening ◽  
Solar System Abundances

Lines of Pt II have been discovered in Hg Mn stars by Dworetsky (1969). The analysis of a few strong Pt II transitions, which are also observed in IUE spectra of stars, has shown (Dworetsky et al., 1984) “that Pt is, like Hg, among the most overabundant elements in the atmospheres of Hg Mn stars, with enhancements of the order of 104 to 105 over the solar system abundances”. Dworetsky et al. (1984) selected also the four Pt II lines which might be used for astrophysical applications. Moreover, they determined the corresponding theoretical gf values. The aim of this contribution is to investigate the Stark broadening of these Pt II lines and to provide the corresponding Stark widths.

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

2010 ◽  
pp. 123-128
Author(s):  
T. Hayakawa ◽  
N. Iwamoto ◽  
T. Shizuma ◽  
T. Kajino ◽  
H. Umeda ◽  
...  
Keyword(s):  
Solar System ◽  
Solar System Abundances

scholarly journals Co-Production of Light p-, s- and r-Process Isotopes in the High-Entropy Wind of Type II Supernovae

2009 ◽  
Vol 26 (3) ◽  
pp. 194-202 ◽  
Author(s):  
K. Farouqi ◽  
K.-L. Kratz ◽  
B. Pfeiffer
Keyword(s):  
Stable Isotopes ◽  
Charged Particle ◽  
Solar System ◽  
Large Scale ◽  
Type Ii ◽  
Isotopic Abundance ◽  
Isotopic Chain ◽  
High Entropy ◽  
R Process ◽  
Particle Process

AbstractWe have performed large-scale nucleosynthesis calculations within the high-entropy-wind (HEW) scenario of Type II supernovae. The primary aim was to constrain the conditions for the production of the classical ‘p-only’ isotopes of the light trans-Fe elements. We find, however, that for electron fractions in the range 0.458 ≤ Ye ≤ 0.478, sizeable abundances of p-, s- and r-process nuclei between 64Zn and 98Ru are coproduced in the HEW at low entropies (S ≤ 100) by a primary charged-particle process after an α-rich freezeout. With the above Ye–S correlation, most of the predicted isotopic abundance ratios within a given element, e.g. 64Zn(p)/70Zn(r) or 92Mo(p)/94Mo(p), as well as of neighboring elements, e.g. 70Ge(s + p)/74Se(p) or 74Se(p)/78Kr(p) agree with the observed Solar-System ratios. Taking the Mo isotopic chain as a particularly challenging example, we show that our HEW model can account for the production of all 7 stable isotopes, from ‘p-only’ 92Mo, via ‘s-only’ 96Mo up to ‘r-only’ 100Mo. Furthermore, our model is able to reproduce the isotopic composition of Mo in presolar SiC X-grains.

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