Zobrazeno 1 - 10
of 69
pro vyhledávání: '"Tan, Kefeng"'
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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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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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
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
Publikováno v:
Publications of the Astronomical Society of the Pacific, 2019 Aug 01. 131(1002), 1-15.
Externí odkaz:
https://www.jstor.org/stable/26874429
Autor:
Tan, Kefeng, Zhao, Gang
Most of the previous studies on beryllium abundances in metal-poor stars have taken different Galactic populations as a whole when investigating the production and evolution of Be. In this Letter, we report on the detection of systematic differences
Externí odkaz:
http://arxiv.org/abs/1108.2074