Zobrazeno 1 - 10
of 216
pro vyhledávání: '"Wang, Yougang"'
Autor:
Suonanben, Wu, Fengquan, He, Kai, Sun, Shijie, Zhou, Wei, Zhou, Minquan, Zhang, Cong, Xu, Jiaqin, Yan, Qisen, Xu, Shenzhe, Zhu, Jiacong, Wang, Zhao, Zhang, Ke, Miao, Haitao, Li, Jixia, Wang, Yougang, Chen, Tianlu, Chen, Xuelei
Publikováno v:
Astronomical Techniques and Instruments, 1(4): 227-238
Detecting primordial fluctuations from the cosmic dark ages requires extremely large low-frequency radio telescope arrays deployed on the far side of the Moon. The antenna of such an array must be lightweight, easily storable and transportable, deplo
Externí odkaz:
http://arxiv.org/abs/2408.09502
Autor:
Hu, Wenkai, Wang, Yougang, Li, Yichao, Pen, Ue-Li, Wang, Jie, Jing, Yingjie, Zhu, Ming, Zhang, Xin, Yang, Wenxiu, Xu, Yidong, Chen, Xu, Chen, Jingze, Zheng, Zheng, Li, Di, Chen, Xuelei
We present an extragalactic HI 21-cm absorption lines catalog from a blind search at z $\leq$ 0.35, using drift-scan data collected in 1616.9 hours by the ongoing Commensal Radio Astronomy FasT Survey (CRAFTS) and FAST All Sky HI Survey (FASHI), whic
Externí odkaz:
http://arxiv.org/abs/2407.14411
Autor:
Yu, Zijie, Deng, Furen, Sun, Shijie, Niu, Chenhui, Li, Jixia, Wu, Fengquan, Wang, Wei-Yang, Wang, Yougang, Zuo, Shifan, Shu, Lin, Hao, Jie, Liu, Xiaohui, Ansari, Reza, Pen, Ue-Li, Stebbins, Albert, Timbie, Peter, Chen, Xuelei
This paper presents the design, calibration, and survey strategy of the Fast Radio Burst (FRB) digital backend and its real-time data processing pipeline employed in the Tianlai Cylinder Pathfinder array. The array, consisting of three parallel cylin
Externí odkaz:
http://arxiv.org/abs/2406.15740
Autor:
Liu, Ziming, Wang, Jie, Jing, Yingjie, Xu, Chen, Liang, Tiantian, Chen, Qingze, Liu, Zerui, Hou, Zhipeng, Wang, Yougang
With the exceptional sensitivity of the Five-hundred-meter Aperture Spherical radio Telescope (FAST), we conducted observations of the neutral hydrogen (HI) in the circumgalactic medium of Andromeda's (M31) satellite galaxies, specifically Andromeda
Externí odkaz:
http://arxiv.org/abs/2406.02215
Autor:
Chen, Xuelei, Gao, Feng, Wu, Fengquan, Zhang, Yechi, Wang, Tong, Liu, Weilin, Zou, Dali, Deng, Furen, Gong, Yang, He, Kai, Li, Jixia, Sun, Shijie, Suo, Nanben, Wang, Yougang, Wu, Pengju, Xu, Jiaqin, Xu, Yidong, Yue, Bin, Zhang, Cong, Zhou, Jia, Zhou, Minquan, Zhu, Chenguang, Zhu, Jiacong
Publikováno v:
Phil. Trans. R. Soc. A.382,20230094(2024)
At the Royal Society meeting in 2023, we have mainly presented our lunar orbit array concept called DSL, and also briefly introduced a concept of a lunar surface array, LARAF. As the DSL concept had been presented before, in this article we introduce
Externí odkaz:
http://arxiv.org/abs/2403.16409
The Tianlai cylinder pathfinder is a radio interferometer array to test 21 cm intensity mapping techniques in the post-reionization era. It works in passive drift scan mode to survey the sky visible in the northern hemisphere. To deal with the large
Externí odkaz:
http://arxiv.org/abs/2312.01064
Publikováno v:
Research in Astronomy and Astrophysics, 23, 105008 (2023)
The Tianlai cylinder array is a pathfinder for developing and testing 21cm intensity mapping techniques. In this paper, we use numerical simulation to assess how its measurement is affected by thermal noise and the errors in calibration and map-makin
Externí odkaz:
http://arxiv.org/abs/2308.04931
We propose a new method for measuring the spatial density distribution of the stellar halo of the Milky Way. Our method is based on a pairwise statistic of the distribution of stars on the sky, the angular two-point correlation function (ATPCF). The
Externí odkaz:
http://arxiv.org/abs/2307.15385
Publikováno v:
Nature Astronomy 7, 1116-1126 (2023)
The absorption features in spectra of high-redshift background radio sources, caused by hyperfine structure lines of hydrogen atoms in the intervening structures, are known collectively as the 21-cm forest. They provide a unique probe of small-scale
Externí odkaz:
http://arxiv.org/abs/2307.04130
Autor:
Li, Yichao, Wang, Yougang, Deng, Furen, Yang, Wenxiu, Hu, Wenkai, Liu, Diyang, Zhao, Xinyang, Zuo, Shifan, Shu, Shuanghao, Li, Jixia, Timbie, Peter, Ansari, Reza, Perdereau, Olivier, Stebbins, Albert, Wolz, Laura, Wu, Fengquan, Zhang, Xin, Chen, Xuelei
This work presents the initial results of the drift-scan observation for the neutral hydrogen (HI) intensity mapping survey with the Five-hundred-meter Aperture Spherical radio Telescope (FAST). The data analyzed in this work were collected in night
Externí odkaz:
http://arxiv.org/abs/2305.06405