He-shell flashes on the surface of oxygen-neon white dwarfs

• 作者: Yunlang Guo Dongdong Liu Chengyuan Wu Bo Wang
• 来源期刊: 天文和天体物理学研究
• 年，卷（期）: 2021,（2）
• 页码范围: 73-81
• 页数: 9页
• 语种: 英文
• DOI: 10.1088/1674-4527/21/2/34

摘要

Accretion induced collapse (AIC) may be responsible for the formation of some interesting neutron star binaries (e.g.,millisecond pulsars,intermediate-mass binary pulsars,etc).It has been suggested that oxygen-neon white dwarfs (ONe WDs) can increase their mass to the Chandrasekhar limit by multiple He-shell flashes,leading to AIC events.However,the properties of He-shell flashes on the surface of ONe WDs are still not well understood.In this article,we aim to study He-shell flashes on the surface of ONe WDs in a systematic approach.We investigated the long-term evolution of ONe WDs accreting He-rich material with various constant mass-accretion rates by time-dependent calculations with the stellar evolution code Modules for Experiments in Stellar Astrophysics (MESA),in which the initial ONe WD masses range from 1.1 to 1.35 M⊙.We found that the mass-retention efficiency increases with the ONe WD mass and the mass-accretion rate,whereas both the nova cycle duration and the ignition mass decrease with the ONe WD mass and the mass-accretion rate.We also present the nuclear products in different accretion scenarios.The results presented in this article can be used in the future binary population synthesis studies of AIC events.