English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Supernovae of type Ia (SNe Ia) are believed to be thermonuclear explosions ofcarbon-oxygen white dwarfs (CO WDs). However, the mass accretion process ontoCO WDs is still not completely understood. In this paper, we study theaccretion of He-rich matter onto CO WDs and explore a scenario in which astrong wind forms on the surface of the WD if the total luminosity exceeds theEddington limit. Using a stellar evolution code called modules for experimentsin stellar astrophysics (MESA), we simulated the He accretion process onto COWDs for WDs with masses of 0.6-1.35Msun and various accretion rates of10^{-8}-10^{-5}Msun/yr. If the contribution of the total luminosity is includedwhen determining the Eddington accretion rate, then a super-Eddington windcould be triggered at relatively lower accretion rates than those of previousstudies based on steady-state models. The super-Eddington wind can prevent theWDs with high accretion rates from evolving into red-giant-like He stars. Wefound that the contributions from thermal energy of the WD are non-negligible,judging by our simulations, even though the nuclear burning energy is thedominating source of luminosity. We also provide the limits of the steadyHe-burning regime in which the WDs do not lose any accreted matter and increasetheir mass steadily, and calculated the mass retention efficiency during Helayer flashes for various WD masses and accretion rates. These obtained resultscan be used in future binary population synthesis computations.

Super-Eddington wind scenario for the progenitors of type Ia supernovae: Accreting He-rich matter onto white dwarfs