期刊文献+
共找到1篇文章
< 1 >
每页显示 20 50 100
The double helium-white dwarf channel for the formation of AM CVn binaries 被引量:2
1
作者 Xian-Fei Zhang Jin-Zhong Liu +2 位作者 C.Simon Jeffery philip d.hall Shao-Lan Bi 《Research in Astronomy and Astrophysics》 SCIE CAS CSCD 2018年第1期101-112,共12页
Most close double helium white dwarfs will merge within a Hubble time due to orbital decay by gravitational wave radiation.However,a significant fraction with low mass ratios will survive for a long time as a conseque... Most close double helium white dwarfs will merge within a Hubble time due to orbital decay by gravitational wave radiation.However,a significant fraction with low mass ratios will survive for a long time as a consequence of stable mass transfer.Such stable mass transfer between two helium white dwarfs(He WDs) provides one channel for the production of AM CVn binary stars.In previous calculations of double He WD progenitors,the accreting He WD was treated as a point mass.We have computed the evolution of 16 double He WD models in order to investigate the consequences of treating the evolution of both components in detail.We find that the boundary between binaries having stable and unstable mass transfer is slightly modified by this approach.By comparing with observed periods and mass ratios,we redetermine masses of eight known AM CVn stars by our double He WDs channel,i.e.HM Cnc,AM CVn,V406 Hya,J0926,J1240,GP Com,Gaia14 aae and V396 Hya.We propose that central spikes in the triple-peaked emission spectra of J1240,GP Com and V396 Hya and the surface abundance ratios of N/C/O in GP Com can be explained by the stable double He WD channel.The mass estimates derived from our calculations are used to discuss the predicted gravitational wave signal in the context of the Laser Interferometer Space Antenna(LISA) project. 展开更多
关键词 stars:peculiar(helium) stars:white dwarfs binaries:close gravitational waves
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部