Nucleosynthesis of pair-instability supernovae
نویسندگان
چکیده
منابع مشابه
Multidimensional simulations of pair-instability supernovae
We present preliminary results from multidimensional numerical studies of pair instability supernova (PSN), studying the fluid instabilities that occur in multiple spatial dimensions. We use the new radiation-hydrodynamics code, CASTRO, and introduce a new mapping procedure that defines the initial conditions for the multidimensional runs in such a way that conservation of physical quantities i...
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Very massive primordial stars (140 M < M < 260 M ) are supposed to end their lives as pair-instability supernovae. Such an event can be traced by a typical chemical signature in low metallicity stars, but at the present time, this signature is lacking in the extremely metal-poor stars we are able to observe. Does it mean that those very massive objects did not form, contrarily to the primordial...
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Growing theoretical evidence suggests that the first generation of stars may have been quite massive (∼ 100 − 300 M ). If they retain their high mass until death, such stars will, after about 3Myr, make pair-instability supernovae. Theoretical models for these explosions have been studied in the literature for about four decades, but very few of these studies have included the effects of rotati...
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We present the basic properties of the yields of our latest set of presupernova evolution and explosive nucleosynthesis of massive stars in the range between 11 and 120 M having solar and zero metallicity.
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Core collapse supernovae are the leading actor in the story of the cosmic origin of the chemical elements. Existing models, which generally assume spherical symmetry and parameterize the explosion, have been able to broadly replicate the observed elemental pattern. However, inclusion of neutrino interactions produces noticeable improvement in the composition of the ejecta when compared to obser...
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ژورنال
عنوان ژورنال: Proceedings of the International Astronomical Union
سال: 2005
ISSN: 1743-9213,1743-9221
DOI: 10.1017/s1743921305005855