Zobrazeno 1 - 10
of 544
pro vyhledávání: '"Han, Zhanwen"'
Type Ia Supernovae (SNe Ia) discovered at redshift $z\lesssim2.5$ are presumed to be produced from Population (Pop) I/II stars. {In this work, we investigate the production of SNe Ia from Pop III binaries in the cosmological framework. We derive the
Externí odkaz:
http://arxiv.org/abs/2407.19357
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 process could happen in helium binary systems once the helium donor star fi
Externí odkaz:
http://arxiv.org/abs/2406.13146
Autor:
Cheng, Qiyuan, XIong, Jianping, Ding, Xu, Ji, Kaifan, Li, Jiao, Liu, Chao, Li, Jiangdan, Luo, Jingxiao, Lyu, Xin, Han, Zhanwen, Chen, Xuefei
Low mass-ratio (q) contact binary systems are progenitors of stellar mergers such as blue straggles (BS) or fast-rotating FK Com stars. In this study, we present the first light curve analysis of two newly identified low mass-ratio contact binary sys
Externí odkaz:
http://arxiv.org/abs/2405.19841
Runaway stars are OB-type stars ejected from their birthplace with large peculiar velocities. The leading hypothesis addressed in their formation includes the supernova ejection mechanism and the dynamic ejection scenario. Identification of runaway p
Externí odkaz:
http://arxiv.org/abs/2405.04750
Autor:
Luo, Changqing, Li, Jiao, Zheng, Chuanjie, Liu, Dongdong, Li, Zhenwei, Luo, Yangping, Nemeth, Peter, Zhang, Bo, Xiong, Jianping, Wang, Bo, Wang, Song, Bai, Yu, Li, Qingzheng, Wang, Pei, Han, Zhanwen, Liu, Jifeng, Huang, Yang, Chen, Xuefei, Liu, Chao
Although supernovae is a well-known endpoint of an accreting white dwarf, alternative theoretical possibilities has been discussing broadly, such as the accretion-induced collapse (AIC) event as the endpoint of oxygen-neon (ONe) white dwarfs, either
Externí odkaz:
http://arxiv.org/abs/2404.04835
The development of spectroscopic survey telescopes like Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST), Apache Point Observatory Galactic Evolution Experiment and Sloan Digital Sky Survey has opened up unprecedented opportunities
Externí odkaz:
http://arxiv.org/abs/2404.03866
Autor:
Li, Zhenwei, Zhang, Yangyang, Chen, Hailiang, Ge, Hongwei, Jiang, Dengkai, Li, Jiangdan, Chen, Xuefei, Han, Zhanwen
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 a helium-burning core and a thin hydrogen envelope $(M_{\rm env }<0.0
Externí odkaz:
http://arxiv.org/abs/2401.12429
Publikováno v:
MNRAS, Volume 532, 2196 (2024)
Millisecond pulsars (MSPs) are a kind of radio pulsars with short spin periods, playing a key role in many aspects of stellar astrophysics. In recent years, some more MSPs with wide orbits ($>30\,\rm d$) have been discovered, but their origin is stil
Externí odkaz:
http://arxiv.org/abs/2401.04395
Autor:
Lin, Jie, Wu, Chengyuan, Xiong, Heran, Wang, Xiaofeng, Nemeth, Peter, Han, Zhanwen, Li, Jiangdan, Elias-Rosa, Nancy, Salmaso, Irene, Filippenko, Alexei V., Brink, Thomas G., Yang, Yi, Chen, Xuefei, Yan, Shengyu, Zhang, Jujia, Guo, Sufen, Cai, Yongzhi, Mo, Jun, Xi, Gaobo, Liu, Jialian, Guo, Jincheng, Xia, Qiqi, Xiang, Danfeng, Li, Gaici, Li, Zhenwei, Zheng, WeiKang, Zhang, Jicheng, Liu, Qichun, Guo, Fangzhou, Chen, Liyang, Li, Wenxiong
Binary evolution theory predicts that the second common envelope (CE) ejection can produce low-mass (0.32-0.36 Msun) subdwarf B (sdB) stars inside ultrashort-orbital-period binary systems, as their helium cores are ignited under nondegenerate conditi
Externí odkaz:
http://arxiv.org/abs/2312.13612
Autor:
Xiao, Lin, Szalai, Tamás, Galbany, Lluís, Fox, Ori, Hu, Lei, Hu, Maokai, Yang, Yi, Moriya, Takashi J., Pessi, Thallis, Han, Zhanwen, Wang, Xiaofeng, Yan, Shengyu
Thanks to the mid-infrared capability offered by Spitzer, systematic searches of dust in SNe have been carried out over the past decade. Studies have revealed the presence of a substantial amount of dust over a broad range of SN subtypes. How normal
Externí odkaz:
http://arxiv.org/abs/2312.00562