32 citations · 211 across the 31 of their papers we have counts for
31 papers
A low mass and radius neutron star candidate in XTE J1810-189?
Shoutao Ban, Helei Liu, Zhaosheng Li +7
Photosphere radius expansion (PRE) bursts provide a crucial tool for constraining the mass and radius of neutron stars. In this study, we analyze time-resolved spectroscopic data f…
Mass-Radius Constraints for 2S 0918-549 from an RXTE Superexpansion Burst: A Direct Cooling-Tail Analysis
Hongbin Fan, Helei Liu, Zhaosheng Li +6
Thermonuclear (Type I ) X-ray bursts from accreting neutron stars offer a means to determine neutron-star (NS) mass () and radius () and thereby probe the properties of matte…
Systematic study of the composition of Type I X-ray burst ashes: Neutron star structure v.s. Reaction rate uncertainties
Guoqing Zhen, Helei Liu, Akira Dohi +4
In this study, we calculate for the first time the impacts of neutron star(NS) structure on the type I X-ray burst ashes using the \texttt{MESA} code. We find an increased mass fra…
A possible formation scenario of the Gaia ID 3425577610762832384: inner binary merger inside a triple common envelope
Zhuowen Li, Xizhen Lu, Guoliang Lü +3
Recently, an identified non-interacting black hole (BH) binary, Gaia ID 3425577610762832384 (hereafter G3425), contains a BH (3.6 M) falling within the mass gap and…
A possible formation scenario of the Gaia BH1: inner binary merger in triple systems
Zhuowen Li, Chunhua Zhu, Xizhen Lu +5
Based on astrometric measurements and spectral analysis from DR3, two quiescent black hole (BH) binaries, BH1 and BH2, have been identified. Their origins remain cont…
Novae: An Important Source of Lithium in the Galaxy
Jun Gao, Chunhua Zhu, Guoliang Lü +4
The source of the Galactic Lithium (Li) has long been a puzzle. With the discovery of Li in novae, extensive research has been conducted. However, there still exists a significant…
The population synthesis of Wolf-Rayet stars involving binary merger channels
Zhuowen Li, Chunhua Zhu, Guoliang Lü +5
Wolf-Rayet stars (WRs) are very important massive stars. However, their origin and the observed binary fraction within the entire WR population are still debated. We investigate so…
The double-peaked type I X-ray bursts with different mass accretion rate and fuel composition
Liyu Song, Helei Liu, Chunhua Zhu +3
Using the MESA code, we have carried out a detailed survey of the available parameter space for the double-peaked type I X-ray bursts. We find that the double-peaked structure appe…
Evolutionary tracks of massive stars with different rotation and metallicity in neutrino H-R diagram
Hao Wang, Chunhua Zhu, Helei Liu +2
Neutrino losses play a crucial role in the evolution of massive stars. We study the neutrino luminosity of stars ranging from 20 to 90 M_{\odot} from Zero Age Main Sequence (ZAMS)…
EOS-dependent millihertz quasi-periodic oscillation in low-mass X-ray binary
Helei Liu, Yong Gao, Zhaosheng Li +4
We studied the frequency and critical mass accretion rate of millihertz quasi-periodic oscillations (mHz QPOs) using a one-zone X-ray burst model. The surface gravity is specified…
An Alternative Formation Scenario for Uranium-rich Giants: Engulfing a Earth-like Planet
Dian Xie, Chunhua Zhu, Sufen Guo +2
The actinides, such as the uranium (U) element, are typically synthesized through the rapid neutron-capture process (r-process), which can occur in core-collapse supernovae or doub…
Scientific Objectives of the Hot Universe Baryon Surveyor (HUBS) Mission
Joel Bregman, Renyue Cen, Yang Chen +51
The Hot Universe Baryon Surveyor (HUBS) is a proposed space-based X-ray telescope for detecting X-ray emissions from the hot gas content in our universe. With its unprecedented spa…
The effects of rotation, metallicity and magnetic field on the islands of failed supernovae
Lei Li, Chunhua Zhu, Sufen Guo +2
Failed supernovae (FSN) are a possible channel for the formation of heavy stellar-mass black holes ( M). However, the effects of metallicity, rotation and…
The Impacts of Neutron-Star Structure and Base Heating on Type I X-Ray Bursts and Code Comparison
Guoqing Zhen, Guoliang Lv, Helei Liu +6
Type I X-ray bursts are rapidly brightening phenomena triggered by thermonuclear burning on accreting layer of a neutron star (NS). The light curves represent the physical properti…
Hydrogen-free Wolf-Rayet stars: Helium stars with envelope-inflation structure and rotation
Xizhen Lu, Chunhua Zhu, Helei Liu +3
Observations have shown that the effective temperature of hydrogen-free Wolf-Rayet (WR) stars is considerably lower than that of the standard model, which means that the radius of…
Li-rich and super Li-rich giants produced by element diffusion
Jun Gao, Chunhua Zhu, Jinlong Yu +4
Context. About 0.2-2% of giant stars are Li-rich, whose lithium abundance (A(Li)) is higher than 1.5 dex. Among them, near 6% are super Li-rich with A(Li) exceeding 3.2 dex. Meanwh…
Impacts of the direct URCA and Superfluidity inside a Neutron Star on Type-I X-Ray Bursts and X-Ray Superbursts
Akira Dohi, Nobuya Nishimura, Hajime Sotani +4
We investigate the impacts of neutrino cooling mechanism inside the neutron star (NS) core on the light curves of type-I X-ray bursts and X-ray superbursts. From several observatio…
Cooling of Isolated Neutron Stars with Pion Condensation: Possible Fast Cooling in a Low-Symmetry-Energy Model
Akira Dohi, Helei Liu, Tsuneo Noda +1
We studied thermal evolution of isolated neutron stars (NSs) including the pion condensation core, with an emphasis on the stiffness of equation of state (EOS). Many temperature ob…
Quiescent luminosities of transiently accreting neutron stars with neutrino heating due to charged pion decay
He-Lei Liu, Zi-Gao Dai, Guo-Liang Lv +3
We study the quiescent luminosities of accreting neutron stars by a new mechanism as neutrino heating for additional deep crustal heating, where the neutrino heating is produced by…
Formation, diffusion and accreting pollution of DB white dwarfs
Chunhua Zhu, Helei Liu, Zhaojun Wang +1
Over 1500 DBZ or DZ white dwarfs (WDs) have been observed so far, and polluted atmospheres with metal elements have been found among these WDs. The surface heavy element abundances…
Quiescent luminosities of accreting neutron stars with different equation of states
Helei Liu, Akira Dohi, Masa-aki Hashimoto +3
We model the quiescent luminosity of accreting neutron stars with several equation of states (EOSs), including the effect of pion condensation and superfluidity. As a consequence o…
Heavy element contributions of rotating massive stars to Interstellar Medium
R. Q. Wu, C. H. Zhu, G. L. Lü +2
Employing the the stellar evolution code (Modules for Experiments in Stellar Astrophysics), we calculate yields of heavy elements from massive stars via stellar wind and core-colla…
Possible Formation Scenarios of ZTF J153932.16+502738.8-A Gravitational Source Close to the Peak of LISA's Sensitivity
Guoliang Lü, Chunhua Zhu, Zhaojun Wang +4
ZTF J153932.16+502738.8 (ZTFJ1539) is an eclipsing double-white-dwarf system with an orbital period of 6.91 minutes, and is a significant source of LISA detecting gravitational wav…
The Formation of Bimodal Dust Species in Nova Ejecta
Adili Duolikun, Chunhua Zhu, Zhaojun Wang +4
The formation of bimodal dust species (namely the silicate and amorphous carbon dust grains coexistent) in a nova eruption is an open problem. According to the nova model simulated…