Zobrazeno 1 - 10
of 735
pro vyhledávání: '"Shi Jianrong"'
Autor:
Mao, Xuan, Liu, He-Yang, Wang, Song, Ling, Zhixing, Yuan, Weimin, Cheng, Huaqing, Pan, Haiwu, Li, Dongyue, Favata, Fabio, Ji, Tuo, Zhang, Jujia, Zhao, Xinlin, Wan, Jing, Cai, Zhiming, Castro-Tirado, Alberto J., Dai, Yanfeng, Deng, Licai, Ding, Xu, Ji, Kaifan, Jin, Chichuan, Lei, Yajuan, Li, Huali, Lin, Jun, Liu, Huaqiu, Liu, Mingjun, Liu, Shuai, Liu, Yuan, Sun, Hui, Sun, Shengli, Sun, Xiaojin, Shi, Jianrong, Wang, Jianguo, Wang, Jingxiu, Wang, Wenxin, Wei, Jianyan, Xin, Liping, Xiong, Dingrong, Zhang, Chen, Zhang, Wenda, Zhang, Yonghe, Zhang, Xiaofeng, Zhao, Donghua, Zhou, Guiping
LEIA (Lobster Eye Imager for Astronomy) detected a new X-ray transient on November 7, 2022, identified as a superflare event occurring on a nearby RS CVn-type binary HD 251108. The flux increase was also detected in follow-up observations at X-ray, U
Externí odkaz:
http://arxiv.org/abs/2410.17999
Autor:
Liu, Zhicun, Cui, Wenyuan, Gu, Jiajia, Shi, Jianrong, Hu, Guozhen, Wang, Xiao-Long, Huo, Zhenyan
In this work, we update the catalog of OB stars based on the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) data release 7 and modified the OB stars selection criterion the spectral line indices space. The new catalog includes 37,
Externí odkaz:
http://arxiv.org/abs/2410.15242
Autor:
Yang, Guochao, Zhao, Jingkun, Liang, Yanchun, Spite, Monique, Spite, Francois, Shi, Jianrong, Liu, Shuai, Liu, Nian, Cui, Wenyuan, Zhao, Gang
Based on the high resolution and high signal-to-noise spectra, we derived the chemical abundances of 20 elements for 20 barium (Ba-) stars. For the first time, the detailed abundances of four sample stars, namely HD 92482, HD 150430, HD 151101 and HD
Externí odkaz:
http://arxiv.org/abs/2410.13177
Autor:
Liu, Shuai, Wei, Huigang, Shi, Jianrong, Li, Wenxian, Han, Henggeng, Liu, Jifeng, Yang, Shangbin
This study investigates the active regions of the M3.0V star G 80-21 using the observed data from the CARMENES project with synthetic spectra generated by the RH1.5D radiative transfer code. The CARMENES project aims to search for exoplanets around M
Externí odkaz:
http://arxiv.org/abs/2409.16028
Autor:
Xie, Xiao-Jin, Shi, Jianrong, Yan, Hong-Liang, Chen, Tian-Yi, Prieto, Carlos Allende, Beers, Timothy C., Liu, Shuai, Li, Chun-Qian, Ding, Ming-Yi, Tang, Yao-Jia, Zhang, Ruizhi, Xie, Renjing
Publikováno v:
ApJL, 2024, Volume 970, Number 2, L30
Highly r-process-enhanced stars are rare and usually metal-poor ([Fe/H] < - 1.0), and mainly populate the Milky Way halo and dwarf galaxies. This study presents the discovery of a relatively bright (V = 12.72), highly r-process-enhanced (r-II) star (
Externí odkaz:
http://arxiv.org/abs/2407.11572
Based on a sample of K giant from Large sky Area Multi-Object fiber Spectroscopic Telescope (LAMOST) Data Release 8 and a sample of RR Lyrae (RRL) from \textit{Gaia} Data Release 3, we investigate the compositions of the Hercules-Aquila Cloud (HAC) a
Externí odkaz:
http://arxiv.org/abs/2407.03713
Autor:
Zhang, Ruizhi, Matsuno, Tadafumi, Li, Haining, Aoki, Wako, Xue, Xiang-Xiang, Suda, Takuma, Zhao, Gang, Chen, Yuqin, Ishigaki, Miho N., Shi, Jianrong, Xing, Qianfan, Zhao, Jingkun
Very metal-poor (VMP) stars record the signatures of early accreted galaxies, making them essential tools for unraveling the early stages of Galaxy formation. Understanding the origin of VMP stars requires comprehensive studies of their chemical comp
Externí odkaz:
http://arxiv.org/abs/2405.02978
Accurate determination of the stellar atmospheric parameters of RR Lyrae stars (RRLs) requires short individual exposures of the spectra to mitigate pulsation effects. We present improved template matching methods to determine the stellar atmospheric
Externí odkaz:
http://arxiv.org/abs/2404.15411
Autor:
Sun, Yongkang, Li, Xin, Ao, Qige, Cui, Wenyuan, Zhang, Bowen, Huang, Yang, Shi, Jianrong, Li, Linlin, Liu, Jifeng
IW And-type dwarf novae are anomalous Z Cam stars featured with outbursts happening during standstill states, which are not expected in the standard disk instability model. The physical mechanisms for these variations remain unclear. In this study, w
Externí odkaz:
http://arxiv.org/abs/2404.09124
Publikováno v:
The Astrophysical Journal, 943:115 (11pp), 2023
The study of Li phenomena in red clump (RC) stars can give us a deeper understanding of the structure and evolution of stars. \citet{2022ApJ...933...58C} explained the RC Li abundance distributions naturally using only standard post main sequence (MS
Externí odkaz:
http://arxiv.org/abs/2403.01056