Zobrazeno 1 - 10
of 212
pro vyhledávání: '"Fan, Zuhui"'
Autor:
Luo, Zhijian, Tang, Zhirui, Chen, Zhu, Fu, Liping, Du, Wei, Zhang, Shaohua, Gong, Yan, Shu, Chenggang, Lu, Junhao, Li, Yicheng, Meng, Xian-Min, Zhou, Xingchen, Fan, Zuhui
Accurate photometric redshift (photo-$z$) estimation requires support from multi-band observational data. However, in the actual process of astronomical observations and data processing, some sources may have missing observational data in certain ban
Externí odkaz:
http://arxiv.org/abs/2406.01719
Autor:
Lu, Junhao, Luo, Zhijian, Chen, Zhu, Fu, Liping, Du, Wei, Gong, Yan, Li, Yicheng, Meng, Xian-Min, Tang, Zhirui, Zhang, Shaohua, Shu, Chenggang, Zhou, Xingchen, Fan, Zuhui
Accurate estimation of photometric redshifts (photo-$z$) is crucial in studies of both galaxy evolution and cosmology using current and future large sky surveys. In this study, we employ Random Forest (RF), a machine learning algorithm, to estimate p
Externí odkaz:
http://arxiv.org/abs/2312.12949
Autor:
Yang, Jinyi, Wu, Xue-Bing, Liu, Dezi, Fan, Xiaohui, Yang, Qian, Wang, Feige, McGreer, Ian D., Fan, Zuhui, Yuan, Shuo, Shan, Huanyuan
We report the results of a faint quasar survey in a one-square-degree field. The aim is to test the Y - K/g - z and J - K/i - Y color selection criteria for quasars at faint magnitudes to obtain a complete sample of quasars based on deep optical and
Externí odkaz:
http://hdl.handle.net/10150/627090
http://arizona.openrepository.com/arizona/handle/10150/627090
http://arizona.openrepository.com/arizona/handle/10150/627090
Autor:
Qiu, Chen, Napolitano, Nicola R., Li, Rui, Fang, Yuedong, Tortora, Crescenzo, Shen, Shiyin, Ho, Luis C., Lin, Weipeng, Wei, Leyao, Li, Ran, Fan, Zuhui, Wang, Yang, Li, Guoliang, Zhan, Hu, Liu, Dezi
Bulge-disk (B-D) decomposition is an effective diagnostic to characterize the galaxy morphology and understand its evolution across time. So far, high-quality data have allowed detailed B-D decomposition to redshift below 0.5, with limited excursions
Externí odkaz:
http://arxiv.org/abs/2306.05909
Autor:
Yao, Ji, Shan, Huanyuan, Li, Ran, Xu, Youhua, Fan, Dongwei, Liu, Dezi, Zhang, Pengjie, Yu, Yu, Wei, Chengliang, Hu, Bin, Li, Nan, Fan, Zuhui, Xu, Haojie, Guo, Wuzheng
The precise estimation of the statistical errors and accurate removal of the systematical errors are the two major challenges for the stage IV cosmic shear surveys. We explore their impact for the China Space-Station Telescope (CSST) with survey area
Externí odkaz:
http://arxiv.org/abs/2304.04489
In weak-lensing cosmological studies, peak statistics is sensitive to nonlinear structures and thus complementary to cosmic shear two-point correlations. In this paper, we explore a new approach, namely, the peak steepness statistics, with the overal
Externí odkaz:
http://arxiv.org/abs/2302.08255
With mock strong gravitational lensing images, we investigate the performance of the broken power-law (BPL) model proposed by \citet{2020ApJ...892...62D} on the mass reconstruction of galaxy-scale lenses. An end-to-end test is carried out, including
Externí odkaz:
http://arxiv.org/abs/2302.04651
We perform weak lensing tomographic peak studies using the first-year shear data from Hyper Suprime-Cam Subaru Strategic Program (HSC-SSP) survey. The effective area used in our analyses after field selection, mask and boundary exclusions is $\sim 58
Externí odkaz:
http://arxiv.org/abs/2210.07853
The galaxy intrinsic alignment (IA) is a dominant source of systematics in weak lensing (WL) studies. In this paper, by employing large simulations with semi-analytical galaxy formation, we investigate the IA effects on WL peak statistics. Different
Externí odkaz:
http://arxiv.org/abs/2210.06761
Autor:
Luo, Ruibiao, Fu, Liping, Luo, Wentao, Napolitano, Nicola R., Xie, Linghua, Radovich, Mario, Liu, Jing, Li, Rui, Amaro, Valeria, Chen, Zhu, Liu, Dezi, Fan, Zuhui, Covone, Giovanni, Vaccari, Mattia
Publikováno v:
A&A 668, A12 (2022)
The multi-band photometry of the VOICE imaging data, overlapping with 4.9 deg$^2$ of the Chandra Deep Field South (CDFS) area, enables both shape measurement and photometric redshift estimation to be the two essential quantities for weak lensing anal
Externí odkaz:
http://arxiv.org/abs/2209.04081