Zobrazeno 1 - 10
of 72
pro vyhledávání: '"Tan, Kefeng"'
Autor:
Li, Chun, Fan, Zhou, Zhao, Gang, Wang, Wei, Zheng, Jie, Tan, Kefeng, Zhao, Jingkun, Huang, Yang, Yuan, Haibo, Xiao, Kai, Chen, Yuqin, Li, Haining, Liu, Yujuan, Song, Nan, Esamdin, Ali, Niu, Hu-Biao, Liu, Jin-Zhong, Feng, Guo-Jie
The Stellar Abundances and Galactic Evolution Survey (SAGES) is a multi-band survey that covers the northern sky area of ~12000 deg2. Nanshan One-meter Wide-field Telescope (NOWT) of Xinjiang Astronomical Observatory (XAO) carried out observations on
Externí odkaz:
http://arxiv.org/abs/2410.10218
Autor:
Avdeeva, Aleksandra, Tan, Kefeng, Joshi, Santosh, Kovaleva, Dana, Singh, Harinder P., Luo, Ali, Malkov, Oleg
Despite having different astronomical characteristics, the studies of mira variables and ultra-cool dwarfs frequently show similar red colors, which could cause leading to photometric misclassification. This study uses photometric data from the WISE,
Externí odkaz:
http://arxiv.org/abs/2409.11266
Autor:
Hong, Jihye, Beers, Timothy C., Lee, Young Sun, Huang, Yang, Hirai, Yutaka, Garcia, Jonathan Cabrera, Shank, Derek, Xu, Shuai, Yuan, Haibo, Mardini, Mohammad K., Catapano, Thomas, Zhao, Gang, Fan, Zhou, Zheng, Jie, Wang, Wei, Tan, Kefeng, Zhao, Jingkun, Li, Chun
Photometric stellar surveys now cover a large fraction of the sky, probe to fainter magnitudes than large-scale spectroscopic surveys, and are relatively free from the target-selection biases often associated with such studies. Photometric-metallicit
Externí odkaz:
http://arxiv.org/abs/2311.02297
Autor:
Fan, Zhou, Zhao, Gang, Wang, Wei, Zheng, Jie, Zhao, Jingkun, Li, Chun, Chen, Yuqin, Yuan, Haibo, Li, Haining, Tan, Kefeng, Song, Yihan, Zuo, Fang, Huang, Yang, Luo, Ali, Esamdin, Ali, Ma, Lu, Li, Bin, Song, Nan, Grupp, Frank, Zhao, Haibin, Ehgamberdiev, Shuhrat A., Burkhonov, Otabek A., Feng, Guojie, Bai, Chunhai, Zhang, Xuan, Niu, Hubiao, Khodjaev, Alisher S., Khafizov, Bakhodir M., Asfandiyarov, Ildar M., Shaymanov, Asadulla M., Karimov, Rivkat G., Yuldashev, Qudratillo, Lu, Hao, Zhaori, Getu, Hong, Renquan, Hu, Longfei, Liu, Yujuan, Xu, Zhijian
The Stellar Abundances and Galactic Evolution Survey (SAGES) of the northern sky is a specifically-designed multi-band photometric survey aiming to provide reliable stellar parameters with accuracy comparable to those from low-resolution optical spec
Externí odkaz:
http://arxiv.org/abs/2306.15611
Autor:
Fan, Zhou, Chen, Bingqiu, Pang, Xiaoying, Ren, Juanjuan, Wang, Song, Wang, Jing, Tan, Kefeng, Song, Nan, Li, Chun, Zheng, Jie, Zhao, Gang
Star clusters are good tracers for formation and evolution of galaxies. We compared different fitting methods by using spectra (or by combining photometry) to determine the physical parameters. We choose a sample of 17 star clusters in M33, which pre
Externí odkaz:
http://arxiv.org/abs/2009.05712
Akademický článek
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We investigate the feasibility of the Si I infrared (IR) lines as Si abundance indicators for giant stars. We find that Si abundances obtained from the Si I IR lines based on the local thermodynamic equilibrium (LTE) analysis show large line-to-line
Externí odkaz:
http://arxiv.org/abs/1603.06305
Autor:
Tan, Kefeng
The explosive mobile data growth needs more spectrum to accommodate the traffic. Existing policy of exclusive spectrum access has made today's spectrum both over-controlled and underutilized. One possibility to improve spectrum efficiency is via dyna
Externí odkaz:
http://pqdtopen.proquest.com/#viewpdf?dispub=3596957
Akademický článek
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Publikováno v:
2014, ApJ, 787, 31
We analyze the kinematics of thick disk and halo stars observed by the Large sky Area Multi-Object Fiber Spectroscopic Telescope. We have constructed a sample of 7,993 F, G and K nearby main-sequence stars (\textit{d} $<$ 2 kpc) with estimates of pos
Externí odkaz:
http://arxiv.org/abs/1405.0639