Impacts of the New Carbon Fusion Cross Sections on Type Ia Supernovae

Abstract

Type Ia supernovae (SNe Ia) are thought to be thermonuclear explosion of white dwarfs (WDs). Their progenitors are not well understood. One popular scenario is the double-degenerate (DD) scenario, which attributes SNe Ia to WD-WD binary mergers. The fates of the WD mergers depend on the rate of ${}^{12}$C+${}^{12}$C reaction. Recently, the ${}^{12}$C+${}^{12}$C cross sections have been measured and the analysis of the data using the Trojan Horse Method suggested that the astrophysical reaction rate is larger than conventional rates at astrophysical temperatures due to possible resonances. The resonance contribution results in a decrease of the carbon burning ignition temperature. Therefore accretion induced collapse occurs more easily and increases the birthrate of Galactic neutron stars with the contribution of the DD scenario to the SNe Ia rate becoming even smaller.

Accepted for publication in MNRAS Letters

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• Impacts of the direct URCA and Superfluidity inside a Neutron Star on Type-I X-Ray Bursts and X-Ray Superbursts
• Impact of the molecular resonances on the 12C+12C fusion reaction rate
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• Evolution of Urca Pairs in the Crusts of Highly Magnetized Neutron Stars
• Progress in Nuclear Astrophysics of East and Southeast Asia
• MAUVE: An Ultraviolet Astrophysics Probe Mission Concept