Abstract
Thermonuclear (type Ia) supernovae are bright stellar explosions with the unique property that the light curves can be standardized, allowing them to be used as distance indicators for cosmological studies. Many fundamental questions bout these events remain, however. We provide a critique of our present understanding of these and present results of simulations assuming the single-degenerate progenitor model consisting of a white dwarf that has gained mass from a stellar companion. We present results from full three-dimensional simulations of convection with weak reactions comprising the A=23 Urca process in the progenitor white dwarf.
Highlights
Thermonuclear supernovae are bright stellar explosions thought to occur when approximately one solar mass of stellar material composed principally of C and O burns under degenerate conditions
There are three progenitor systems widely under study: the “single degenerate” scenario in which a C/O white dwarf (WD) gains mass from a companion and explodes as it approaches a limiting mass, the “double degenerate” scenario in which two WDs merge and subsequently explode, and the “double detonation” model in which a detonation in an accreted He layer triggers a detonation in the underlying C/O WD [5–8, and references therein]
We explore the evolution of the progenitor white dwarf as it approaches the limiting mass in the single degenerate scenario
Summary
Thermonuclear (type Ia) supernovae are bright stellar explosions thought to occur when approximately one solar mass of stellar material composed principally of C and O burns under degenerate conditions. Subsequent studies using analytic results and onedimensional stellar evolution models [28,29,30,31,32,33,34] showed that the convective Urca process is complex and stressed the need for multidimensional simulations.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
