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

Type Ia supernovae (SNe Ia) have been an important tool for astronomy forquite some time; however, the nature of their progenitors remains somewhatmysterious. Recent theoretical studies indicated the possibility of producingthermonuclear detonations of carbon-oxygen white dwarfs (CO WDs) at masses lessthan the Chandrasekhar mass through accretion of helium-rich matter, whichwould, depending on mass accretion rate, mass, and initial temperature of theWD, spectrally resemble either a normal SN Ia or a peculiar one. This studyaims to further resolve the state of binary systems comprised of asub-Chandrasekhar-mass CO WD and a helium star at the point where anaccretion-induced detonation occurs and constrains the part of the initialparameter space where this kind of phenomenon is possible. Preexisting dataobtained through simulations of single, constantly accreting CO WDs is used asan indicator for the behavior of new binary models in which the WD is treatedas a point mass and which include the non-degenerate partner as a fullyresolved stellar model. We parameterize the ignition of the accumulated heliumlayer, changes in the WD temperature, and changes in the CO core mass dependingon the mass transfer rate. The initial conditions allowing for detonation donot form a single contiguous area in the parameter space, whose shape isprofoundly influenced by the behavior of the donor star. Mass loss due to Novaoutbursts acts in favor of detonation. According to our criteria, about 10% ofthe detonations in this study can be expected to show spectra consistent withordinary SNe Ia; the rest exhibit peculiar features.

Models for the evolution of close binaries with He-Star and WD components towards Type Ia supernova explosions