73 citations · 280 across the 11 of their papers we have counts for
11 papers
Theoretical models for the Late Thermal Pulse in post-AGB stars: the case of DY Cen
Zhongyang Liu, C. Simon Jeffery, Xianfei Zhang +2
We present theoretical predictions of the born-again scenario for post-asymptotic giant-branch stars. An extensive model grid for born-again objects has been constructed, particula…
A magnetic white dwarf formed through a binary merger within 35 million years
Huahui Yan, Jiamao Lin, Rizhong Zheng +15
White dwarfs (WDs) represent the final evolutionary stage of most stars, typically originating from progenitor stars with masses below approximately 8 to 10 …
Post-merger evolution of double helium white dwarfs and distribution of helium-rich hot subdwarfs
Jinlong Yu, Xianfei Zhang, Guoliang Lv
The mergers of double helium white dwarfs are believed to form isolated helium-rich hot subdwarfs. Observation shows that the helium-rich hot subdwarfs can be divided into two subg…
Population synthesis of helium white dwarf--red giant star mergers and the formation of lithium-rich giants and carbon stars
Xianfei Zhang, C. Simon Jeffery, Yaguang Li +1
The formation histories of lithium-rich and carbon-rich red giants are not yet understood. It has been proposed that the merger of a helium-core white dwarf with a red giant branch…
The double helium-white dwarf channel for the formation of AM CVn binaries
Xianfei Zhang, Jinzhong Liu, C. Simon Jeffery +2
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 wil…
Evolution models of helium white dwarf--main-sequence star merger remnants: the mass distribution of single low-mass white dwarfs
Xianfei Zhang, Philip D. Hall, C. Simon Jeffery +1
It is not known how single white dwarfs with masses less than 0.5Msolar -- low-mass white dwarfs -- are formed. One way in which such a white dwarf might be formed is after the mer…
Evolution models of helium white dwarf--main sequence star merger remnants
Xianfei Zhang, Philip D. Hall, C. Simon Jeffery +1
It is predicted that orbital decay by gravitational-wave radiation and tidal interaction will cause some close-binary stars to merge within a Hubble time. The merger of a helium-co…
Post-merger evolution of carbon-oxygen + helium white dwarf binaries and the origin of R Coronae Borealis and extreme helium stars
Xianfei Zhang, C. Simon Jeffery, Xuefei Chen +1
Orbital decay by gravitational-wave radiation will cause some close-binary white dwarfs (WDs) to merge within a Hubble time. The results from previous hydrodynamical WD-merger simu…
White-dwarf red-giant mergers, early-type R stars, J stars and lithium
Xianfei Zhang, C. Simon Jeffery
Early-type R stars and J stars are a special type of carbon star, having enhanced nitrogen (), lithium, a low \iso{12}{C}/\iso{13}{C} ratio () and no s-…
Pulsations driven by the -mechanism in post-merger remnants: first results
Marcelo M. Miller Bertolami, Alejandro H. Córsico, Xianfei Zhang +2
Helium-rich subdwarfs are a rare subclass of hot subdwarf stars which constitute a small and inhomogeneous group showing varying degrees of helium enrichment. Only one star, LS IV…
Can R CrB stars form from the merger of two helium white dwarfs?
Xianfei Zhang, C. Simon Jeffery
Due to orbital decay by gravitational-wave radiation, some close-binary helium white dwarfs are expected to merge within a Hubble time. The immediate merger products are believed t…