Sensitivity study of explosive nucleosynthesis in type Ia supernovae: Modification of individual thermonuclear reaction rates
نویسندگان
چکیده
منابع مشابه
Nucleosynthesis in Type Ia Supernovae
Among the major uncertainties involved in the Chandrasekhar mass models for Type Ia supernovae are the companion star of the accreting white dwarf (or the accretion rate that determines the carbon ignition density) and the flame speed after ignition. We present nucleosynthesis results from relatively slow deflagration (1.5 3 % of the sound speed) to constrain the rate of accretion from the comp...
متن کاملThe Reaction Rate Sensitivity of Nucleosynthesis in Type II Supernovae
We explore the sensitivity of the nucleosynthesis of intermediate mass elements (28 ≤ A <∼80) in supernovae derived from massive stars to the nuclear reaction rates employed in the model. Two standard sources of reaction rate data (Woosley et al. 1978; and Thielemann et al. 1987) are employed in pairs of calculations that are otherwise identical. Two stellar models are calculated for each of tw...
متن کاملThe ignition of thermonuclear flames in Type Ia supernovae
In the framework of the Chandrasekhar-mass deflagration model for Type Ia supernovae (SNe Ia), a persisting free parameter is the initial morphology of the flame front, which is linked to the ignition process in the progenitor white dwarf. Previous analytical models indicate that the thermal runaway is driven by temperature perturbations (“bubbles”) that develop in the white dwarf’s convective ...
متن کاملGeneral properties of astrophysical reaction rates in explosive nucleosynthesis
Fundamental differences in the prediction of reaction rates with intermediate and heavy target nuclei compared to the ones with light nuclei are discussed, with special emphasis on stellar modifications of the rates. Ground and excited state contributions to the stellar rates are quantified, deriving a linear weighting of excited state contributions despite of a Boltzmann population of the nucl...
متن کاملExplosive Nucleosynthesis in Axisymmetrically Deformed Type II Supernovae
Explosive nucleosynthesis under the axisymmetric explosion in Type II supernova has been performed by means of two dimensional hydrodynamical calculations. We have compared the results with the observations of SN 1987A. Our chief findings are as follows: (1) Ti is synthesized so much as to explain the tail of the bolometric light curve of SN 1987A. We think this is because the alpha-rich freeze...
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ژورنال
عنوان ژورنال: Physical Review C
سال: 2012
ISSN: 0556-2813,1089-490X
DOI: 10.1103/physrevc.85.055805