Zobrazeno 1 - 10
of 103
pro vyhledávání: '"Lu, Kai-Xing"'
Autor:
Feng, Hai-Cheng, Li, Sha-Sha, Bai, J. M., Liu, H. T., Lu, Kai-Xing, Pang, Yu-Xuan, Sun, Mouyuan, Wang, Jian-Guo, Zhang, Yang-Wei, Zhou, Shuying
We present the results of a four-year velocity-resolved reverberation mapping (RM) campaign of the changing-look active galactic nucleus (CL-AGN) NGC 4151 during its outburst phase. By measuring the time lags of the \ha, \hb, \hg, \hei, and \heii\ em
Externí odkaz:
http://arxiv.org/abs/2409.01637
Autor:
Zhou, Shuying, Sun, Mouyuan, Feng, Hai-Cheng, Li, Sha-Sha, Xue, Yongquan, Wang, Jun-Xian, Cai, Zhen-Yi, Bai, Jin-Ming, Li, Danyang, Guo, Hengxiao, Liu, H. T., Lu, Kai-Xing, Mao, Jirong, Marculewicz, Marcin, Wang, Jian-Guo
Resolving the inner structures of active galactic nuclei (AGNs) provides the "standard ruler" to measure the parallax distances of the Universe and a powerful way to weigh supermassive black holes (SMBHs). Thanks to time-domain observations, it is po
Externí odkaz:
http://arxiv.org/abs/2408.11292
Autor:
Li, Sha-Sha, Feng, Hai-Cheng, Liu, H. T., Bai, J. M., Ji, Xiang, Cheng, Cheng, Lu, Kai-Xing, Wang, Jian-Guo, Li, Rui
Publikováno v:
ApJ, 972, 105 (2024)
Broad emission lines of active galactic nuclei (AGNs) originate from the broad-line region (BLR), consisting of dense gas clouds in orbit around an accreting supermassive black hole. Understanding the geometry and kinematics of the region is crucial
Externí odkaz:
http://arxiv.org/abs/2407.05414
Autor:
Feng, Hai-Cheng, Li, Rui, Napolitano, Nicola R., Li, Sha-Sha, Bai, J. M., Li, Ran, Liu, H. T., Lu, Kai-Xing, Radovich, Mario, Shan, Huan-Yuan, Wang, Jian-Guo, Xi, Wen-Zhe, Xie, Ling-Hua, Zhang, Yang-Wei
We present a novel multimodal neural network for classifying astronomical sources in multiband ground-based observations, from optical to near infrared, to separate sources in stars, galaxies and quasars. Our approach combines a convolutional neural
Externí odkaz:
http://arxiv.org/abs/2406.03797
Autor:
Xi, Wen-Zhe, Lu, Kai-Xing, Feng, Hai-Cheng, Li, Sha-Sha, Bai, Jin-Ming, Zhou, Rui-Lei, Liu, Hong-Tao, Wang, Jian-Guo
Publikováno v:
Res.Astron.Astrophys.23(2023)125021
Long-term spectroscopic monitoring campaigns on active galactic nuclei (AGNs) provide a wealth of information about its interior structure and kinematics. However, a number of the observations suffer from the contamination of second-order spectra (SO
Externí odkaz:
http://arxiv.org/abs/2401.11970
Autor:
Zhang, Zhi-Xiang, Zheng, Ling-Lin, Gu, Wei-Min, Sun, Mouyuan, Yi, Tuan, Shi, Jian-Rong, Wang, Song, Bai, Zhong-Rui, Zhang, Hao-Tong, Cui, Wen-Yuan, Wang, Junfeng, Wu, Jianfeng, Li, Xiang-Dong, Shao, Yong, Lu, Kai-Xing, Bai, Yu, Li, Chunqian, Fu, Jin-Bo, Liu, Jifeng
We present LAMOST~J041920.07+072545.4 (hereafter J0419), a close binary consisting of a bloated extremely low mass pre-white dwarf (pre-ELM WD) and a compact object with an orbital period of 0.607189~days. The large-amplitude ellipsoidal variations a
Externí odkaz:
http://arxiv.org/abs/2209.13889
Autor:
Lu, Kai-Xing, Bai, Jin-Ming, Wang, Jian-Min, Hu, Chen, Li, Yan-Rong, Du, Pu, Xiao, Ming, Feng, Hai-Cheng, Li, Sha-Sha, Wang, Jian-Guo, Zhang, Zhi-Xiang, Huang, Ying-Ke
NGC 5548 is one of the active galactic nuclei (AGN) selected for our long-term spectroscopic monitoring with the Lijiang 2.4~m telescope, aiming at investigating the origin and evolution of the broad-line regions (BLRs), accurately measuring the mass
Externí odkaz:
http://arxiv.org/abs/2209.10853
Autor:
Li, Sha-Sha, Feng, Hai-Cheng, Liu, H. T., Bai, J. M., Li, Rui, Lu, Kai-Xing, Wang, Jian-Guo, Huang, Ying-Ke, Zhang, Zhi-Xiang
Changing-look active galactic nucleus NGC~4151, which has attracted a lot of attention, is undergoing the second dramatic outburst stage in its evolutionary history. To investigate the geometry and kinematics of the broad-line region (BLR), and measu
Externí odkaz:
http://arxiv.org/abs/2208.02966
Autor:
Fu, Yuming, Wu, Xue-Bing, Jiang, Linhua, Zhang, Yanxia, Huo, Zhi-Ying, Ai, Y. L., Yang, Qian, Ma, Qinchun, Feng, Xiaotong, Joshi, Ravi, Hon, Wei Jeat, Wolf, Christian, Li, Jiang-Tao, Jin, Junjie, Yao, Su, Pang, Yuxuan, Wang, Jian-Guo, Lu, Kai-Xing, Wang, Chuan-Jun, Zheng, Jie, Xu, Liang, Yu, Xiao-Guang, Lun, Bao-Li, Zuo, Pei
Publikováno v:
2022 ApJS 261 32
Quasars behind the Galactic plane (GPQs) are important astrometric references and valuable probes of Galactic gas, yet the search for GPQs is difficult due to severe extinction and source crowding in the Galactic plane. In this paper, we present a sa
Externí odkaz:
http://arxiv.org/abs/2206.05704
Autor:
Huang, Ying-Ke, Fang, Yue-Dong, Lu, Kai-Xing, Zhang, Zhi-Xiang, Liu, Ji-Lin, Li, Sha-sha, Luo, Bao-Rui, Lin, Qin, Huo, Zhuo-Xi
Measuring the quasar distance through joint analysis of spectroastrometry (SA) and reverberation mapping (RM) observations is a new method for driving the development of cosmology. In this paper, we carry out detailed simulation and analysis to study
Externí odkaz:
http://arxiv.org/abs/2112.14069