Accreting CO material onto ONe white dwarfs towards accretion-induced collapse

Abstract

The final outcomes of accreting ONe white dwarfs (ONe WDs) have been studied for several decades, but there are still some issues not resolved. Recently, some studies suggested that the deflagration of oxygen would occur for accreting ONe WDs with Chandrasekhar masses. In this paper, we aim to investigate whether ONe WDs can experience accretion-induced collapse (AIC) or explosions when their masses approach the Chandrasekhar limit. Employing the stellar evolution code modules for experiments in stellar astrophysics (MESA), we simulate the long-term evolution of ONe WDs by accreting CO material. The ONe WDs undergo weak multicycle carbon flashes during the mass-accretion process, leading to the mass increase of the WDs. We found that different initial WD masses and mass-accretion rates have influence on the evolution of central density and temperature. However, the central temperature cannot reach the explosive oxygen ignition temperature due to the neutrino cooling. This work implies that the final outcome of accreting ONe WDs is electron-capture induced collapse rather than thermonuclear explosion.

12 pages, 8 figures, 1 table, accepted for publication in Research in Astronomy and Astrophysics (RAA)

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Cited by in corpus (16)

• Mass-accreting white dwarfs and type Ia supernovae
• Stellar Collapse Diversity and the Diffuse Supernova Neutrino Background
• The formation of neutron star systems through accretion-induced collapse in white-dwarf binaries
• The formation of single neutron-stars from double white-dwarf mergers via accretion-induced collapse
• Evolving ONe WD+He star systems to intermediate-mass binary pulsars
• Formation of millisecond pulsars with long orbital periods by accretion-induced collapse of white-dwarfs
• The single-degenerate model for the progenitors of accretion-induced collapse events
• The outcomes of carbon-oxygen white dwarfs accreting CO-rich material
• Oxygen-neon rich merger during common envelope evolution
• The formation of type Ia supernovae from carbon-oxygen-silicon white dwarfs
• Off-centre carbon burning in He-accreting carbon-oxygen white dwarfs
• Evolving ONe WD+He WD systems to ultra-compact X-ray binaries
• The Formation of Electron-capture Supernovae: A Review
• Accretion-induced Collapse of Dark Matter-admixed Rotating White Dwarfs: Dynamics and Gravitational-wave Signals
• He-shell flashes on the surface of oxygen-neon white dwarfs
• The Head-on Collision of a Neutron Star with a White Dwarf