Zobrazeno 1 - 10
of 1 404
pro vyhledávání: '"ZHANG Jinghua"'
Autor:
Cheng, Yehao, Pan, Yu, Yang, Yuan-Pei, Zhang, Jinghua, Du, Guowang, Fang, Yuan, Kumar, Brajesh, Guo, Helong, Er, Xinzhong, Chen, Xinlei, Liu, Chenxu, Wang, Tao, Qin, Zhenfei, Jin, Yicheng, Zou, Xingzhu, Han, Xuhui, Zhang, Pinpin, Xin, Liping, Wu, Chao, Lian, Jianhui, Liu, Xiangkun, Liu, Xiaowei
Gamma-ray bursts (GRBs) are the most luminous transients in the universe. The interaction of the relativistic jet with the circumburst medium produces an afterglow and generates multiwavelength emission. In this work, we present simultaneous multiban
Externí odkaz:
http://arxiv.org/abs/2409.14716
Autor:
Chen, Xinlei, Kumar, Brajesh, Er, Xinzhong, Guo, Helong, Yang, Yuan-Pei, Lin, Weikang, Fang, Yuan, Du, Guowang, Liu, Chenxu, Zhao, Jiewei, Zhang, Tianyu, Bao, Yuxi, Zou, Xingzhu, Pan, Yu, Wang, Yu, Zhu, Xufeng, Chatterjee, Kaushik, Liu, Xiangkun, Liu, Dezi, Lagioia, Edoardo P., Rangwal, Geeta, Zhong, Shiyan, Zhang, Jinghua, Lian, Jianhui, Cai, Yongzhi, Zhang, Yangwei, Liu, Xiaowei
Publikováno v:
ApJL, 2024, 971:L2
We present early-phase good-cadence (hour-to-day) simultaneous multiband ($ugi$ and $vrz$ bands) imaging of the nearby supernova SN~2024ggi, which exploded in the nearby galaxy, NGC 3621. A quick follow-up was conducted within less than a day after t
Externí odkaz:
http://arxiv.org/abs/2405.07964
Autor:
Zhang, Jinghua, Xiang, Maosheng, Yu, Jie, Ge, Jian, Xie, Ji-Wei, Zhang, Hui, Li, Yaguang, Wu, You, Li, Chun-Qian, Bi, Shaolan, Yan, Hong-Liang, Shi, Jian-Rong
Accurately characterizing intrinsic stellar photometric noise induced by stellar astrophysics, such as stellar activity, granulation, and oscillations, is of crucial importance for detecting transiting exoplanets. In this study, we investigate the re
Externí odkaz:
http://arxiv.org/abs/2404.13850
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
Increasing observed data indicate that part of giants has abnormally high lithium (Li) inside their surface, and their proportion is around 1%. Instead of pursuing the feasible mechanisms for extra Li enrichment, we focus on how to inhibit Li depleti
Externí odkaz:
http://arxiv.org/abs/2403.00215
Autor:
Ye, Lifei, Bi, Shaolan, Zhang, Jinghua, Sun, Tiancheng, Long, Liu, Ge, Zhishuai, Li, Tanda, Zhang, Xianfei, Chen, Xunzhou, Li, Yaguang, Zhou, Jianzhao, Xiang, Maosheng
The empirical relations between rotation period, chromospheric activity, and age can be used to estimate stellar age. To calibrate these relations, we present a catalog, including the masses and ages of 52,321 FGK dwarfs, 47,489 chromospheric activit
Externí odkaz:
http://arxiv.org/abs/2401.15438
Autor:
Liu, Chenxu, Chen, Xinlei, Er, Xinzhong, Zeimann, Gregory R., Vinko, Jozsef, Wheeler, J. Craig, Cooper, Erin Mentuch, Davis, Dustin, Farrow, Daniel J., Gebhardt, Karl, Guo, Helong, Hill, Gary J., House, Lindsay, Kollatschny, Wolfram, Kong, Fanchuan, Kumar, Brajesh, Liu, Xiangkun, Tuttle, Sarah, Endl, Michael, Duke, Parker, Cochran, William D., Zhang, Jinghua, Liu, Xiaowei
Supernova (SN) 2023ixf was discovered on May 19th, 2023. The host galaxy, M101, was observed by the Hobby Eberly Telescope Dark Energy Experiment (HETDEX) collaboration over the period April 30, 2020 -- July 10, 2020, using the Visible Integral-field
Externí odkaz:
http://arxiv.org/abs/2311.10400
Autor:
Huang, Xin, He, Yu-JI, Bai, ZhongRui, Yuan, Hailong, Yang, MingKuan, Zhou, Ming, Dong, Yiqiao, Wang, Mengxin, He, Han, Zhang, Jinghua, Chu, Yao-Quan, Zhao, Yongheng, Zhang, Yong, Zhang, Haotong
We have established and released a new stellar index library of the Ca II Triplet, which serves as an indicator for characterizing the chromospheric activity of stars. The library is based on data from the Large Sky Area Multi-Object Fiber Spectrosco
Externí odkaz:
http://arxiv.org/abs/2311.03120
Few-shot Class-Incremental Learning (FSCIL) presents a unique challenge in Machine Learning (ML), as it necessitates the Incremental Learning (IL) of new classes from sparsely labeled training samples without forgetting previous knowledge. While this
Externí odkaz:
http://arxiv.org/abs/2308.06764
Autor:
Sun, Tiancheng, Ge, Zhishuai, Chen, Xunzhou, Bi, Shaolan, Li, Tanda, Zhang, Xianfei, Li, Yaguang, Wu, Yaqian, Bird, Sarah A., W., Ferguson J., Zhou, Jianzhao, Ye, Lifei, Long, Liu, Zhang, Jinghua
Varying oxygen abundance could impact the modeling-inferred ages. This work aims to estimate the ages of dwarfs considering observed oxygen abundance. To characterize 67,503 LAMOST and 4,006 GALAH FGK-type dwarf stars, we construct a grid of stellar
Externí odkaz:
http://arxiv.org/abs/2307.04086