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36 papers
Unravelling the Nature of AT 2025abao: From Precursor to Final Fate
Zhuo Chen, Yingzhen Cui, Tianshu Wu +9
Luminous red novae (LRNe) are potential signatures of common envelope evolution (CEE), a critical yet poorly understood phase in compact binary formation. AT 2025abao, an LRN in th…
The Common Envelope Evolution Outcome. III. the Improvement of Stellar Binding Energy with the Envelope Residual
Lifu Zhang, Hongwei Ge, Dylan Hebrail +7
Common-envelope evolution (CEE) is a key process in the evolution of close binary systems. Many important astrophysical objects and evolutionary stages are closely related to CEE,…
The scarcity of white dwarf-brown dwarf binaries in the solar neighbourhood: A population synthesis study
Alejandro Santos-García, Santiago Torres, Alberto Rebassa-Mansergas +3
White dwarf--brown dwarf (WD--BD) binaries are intrinsically rare systems that provide a unique opportunity to study binary evolution and the formation of substellar companions. De…
A Helium-shell Burning Blue Horizontal Branch Star Produced from Common Envelope Evolution
Jiao Li, Changqing Luo, Hai-Liang Chen +16
Observationally, blue horizontal branch (BHB) stars are defined as hot stars occupying a characteristic region between the extreme blue horizontal branch and RR Lyrae variables in…
Influence of mass-transfer stability on the formation of post-common-envelope binaries
Yanxu Shi, Hongwei Ge, Zhenwei Li +9
Post-common-envelope binaries are the natural laboratories for constraining the physics of common envelope evolution, which is one of the most uncertain phases in binary stellar ev…
Mass-Orbital Period Distribution of Massive White Dwarfs Formed Through Stable Mass Transfer
Rizhong Zheng, Hongwei Ge, Christopher A Tout +10
White dwarfs (WDs) in binaries can form through either the stable mass-transfer process or common envelope evolution (CEE). Compared to CEE, the stable mass-transfer process can le…
Formation of Extremely Low-mass White Dwarf Binaries Undergoing Enhanced Angular Momentum Loss
Ziqi Zhao, Zhenwei Li, Zhengwei Liu +6
Extremely low-mass white dwarfs (ELM WDs) are helium (He) WDs with masses below , mainly formed through binary interaction. ELM WD binaries typically are forme…
Asteroseismic rotation rates of hot subdwarf B stars hint at transient accretion from leftover common envelope matter
Facundo D. Moyano, Hongwei Ge, Zhanwen Han +6
Asteroseismology enabled measuring the rotation rate in the deep stellar interiors of stars across several evolutionary phases, advancing the theory of angular momentum transport i…
A Path to Constraints on Common Envelope Ejection in Massive Binaries: Full Evolutionary Reconstruction of Three Black Hole X-ray Binaries
Zhenwei Li, Dandan Wei, Shi Jia +6
The massive binary common envelope (CE) phase plays a pivotal role in the formation of close black hole/neutron star (BH/NS) binaries, yet significant uncertainties remain in our u…
Stellar Parameters and Orbital Period Estimates for Composite-Spectrum sdB+MS Binaries from LAMOST
Jiangdan Li, Jianping Xiong, Jiao Li +5
Hot subdwarf (sdB) stars in binary systems with main-sequence (MS) companions provide valuable insights into mass transfer and envelope ejection processes in binary evolution. Thei…
Formation of Be stars via wind accretion: Case study on Black hole + Be star binaries
Zhenwei Li, Shi Jia, Dandan Wei +5
Be stars are rapidly rotating main-sequence (MS) stars that play a crucial role in understanding stellar evolution and binary interactions. In this letter, we propose a new formati…
The relation between helium white dwarf mass and orbital period under two types of opacity
Jian Mou, Hai-Liang Chen, Dengkai Jiang +5
Helium white dwarfs (He WDs) are end products of low-mass red giant donors in close binary systems via stable mass transfer or common envelope evolution. At the end of stable mass…
A Be Star + He Star Binary as an Indicator of a Binary Mass Transfer Phase
Yuchen Bao, Zhenwei Li, Hongwei Ge +2
The rapid rotation of Be stars is supposed to mainly originate from binary evolution. In recent years, more and more Be stars with helium (He) star companions have been discovered,…
Mass Transfer Physics in Binary Stars and Applications in Gravitational Wave Sources
Hongwei Ge, Zhanwen Han
The stability criteria of rapid mass transfer and common-envelope evolution are fundamental in binary star evolution. They determine the mass, mass ratio, and orbital distribution…
A potential mass-gap black hole in a wide binary with a circular orbit
Wang Song, Zhao Xinlin, Feng Fabo +28
Mass distribution of black holes identified through X-ray emission suggests a paucity of black holes in the mass range of 3 to 5 solar masses. Modified theories have been devised t…
Adiabatic Mass Loss in Binary Stars. V. Effects of Metallicity and Nonconservative Mass Transfer -- Application in High Mass X-ray Binaries
Hongwei Ge, Christopher Adam Tout, Xuefei Chen +5
Binary stars are responsible for many unusual astrophysical phenomena, including some important explosive cosmic events. The stability criteria for rapid mass transfer and common-e…
Adiabatic Mass Loss In Binary Stars. IV. Low and Intermediate Mass Helium Binary Stars
Lifu Zhang, Hongwei Ge, Xuefei Chen +1
The unstable mass transfer situation in binary systems will asymptotically cause the adiabatic expansion of the donor star and finally lead to the common envelope phase. This proce…
A new route to massive hot subdwarfs: common envelope ejection from asymptotic giant branch stars
Zhenwei Li, Yangyang Zhang, Hailiang Chen +5
The hot subdwarf O/B stars (sdO/Bs) are known as extreme horizontal branch stars, which is of great importance in stellar evolution theory. The sdO/Bs are generally thought to have…
One model to rule them all: magnetic braking from CVs to low-mass stars
Arnab Sarkar, Hongwei Ge, Lev Yungelson +1
We present the results of the study of cataclysmic variables (CVs) and AM Canum Venaticorum (AM CVn) stars with our double dynamo (DD) formalism of angular momentum loss (AML) by m…
The Common Envelope Evolution Outcome. II. Short Orbital Period Hot Subdwarf B Binaries Reveal a Clear Picture
Hongwei Ge, Christopher A Tout, Ronald F Webbink +6
The common envelope evolution (CEE) is vital in forming short orbital period compact binaries. It covers many objects, such as double compact merging binaries, type Ia supernovae p…
The Distribution of Semi-Detached Binaries. I.An Efficient Pipeline
JianPing Xiong, Xu Ding, Jiadong Li +5
Semi-detached binaries are in the stage of mass transfer and play a crucial role in studying mass transfer physics between interacting binaries. Large-scale time-domain surveys pro…
Criteria for Dynamical Timescale Mass Transfer of Metal-poor Intermediate-mass Stars
Hongwei Ge, Christopher A. Tout, Xuefei Chen +3
The stability criteria of rapid mass transfer and common envelope evolution are fundamental in binary star evolution. They determine the mass, mass ratio and orbital distribution o…
LAMOST medium-resolution spectroscopic survey of binarity and exotic star (LAMOST-MRS-B): Observation strategy and target selection
Jiao Li, Jiang-Dan Li, Yan-Jun Guo +15
LAMOST-MRS-B is one of the sub-surveys of LAMOST medium-resolution (R~7500) spectroscopic survey. It aims at studying the statistical properties (e.g., binary fraction, orbital per…
New insights into the helium star formation channel of AM CVn systems with explanations of Gaia14aae and ZTFJ1637+49
Arnab Sarkar, Hongwei Ge, Christopher A. Tout
We model helium-rich stars with solar metallicity () progenitors that evolve to form AM Canum Venaticorum systems through a helium-star formation channel, with the…