Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Hua-Wei Zhang"'
Publikováno v:
The Astrophysical Journal, Vol 944, Iss 1, p 88 (2023)
We present a sample of 135,873 RR Lyrae stars (RRLs) with precise photometric metallicity and distance estimates from our newly calibrated P – ϕ _31 – R _21 –[Fe/H]/ P – R _21 –[Fe/H] and G -band absolute magnitude–metallicity relations.
Externí odkaz:
https://doaj.org/article/7fb8e09650ec4419a27c0118be7e32d0
Autor:
Wei Zhang, Zhi-Ying Huo, Jianrong Shi, Xiaowei Liu, Juanjuan Ren, Yang Huang, Yong-Heng Zhao, Yue-Fei Wang, Jiali Wang, Bingqiu Chen, A-Li Luo, Yong-Hui Hou, Chun Wang, Mao-Sheng Xiang, Yong Zhang, Hua-Wei Zhang, Jing Li, Jian Zhang, Haibo Yuan
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 464:3657-3678
Accurate determination of stellar atmospheric parameters and elemental abundances is crucial for Galactic archeology via large-scale spectroscopic surveys. In this paper, we estimate stellar atmospheric parameters -- effective temperature T_{\rm eff}
Autor:
Yan Lu, A-Li Luo, Fang Zuo, Xiang-Lei Chen, Wen Hou, Yin-Bi Li, Li Qin, Rui Wang, Georges Comte, Bing Du, Jian-Jun Chen, Hua-Wei Zhang, Yi-Han Song, Shuo Zhang, John E. Gizis
Publikováno v:
The Astrophysical Journal
The Astrophysical Journal, 2021, 908, 18 pp. ⟨10.3847/1538-4357/abcfc5⟩
The Astrophysical Journal, 2021, 908, 18 pp. ⟨10.3847/1538-4357/abcfc5⟩
Applying the revised M subdwarf classification criteria discussed in Paper I to LAMOST DR7, combining the M subdwarf sample from Savcheva et al, a new M subdwarf sample was constructed for further study. The atmospheric parameters for each object wer
Autor:
Xiaowei Liu, Mao-Sheng Xiang, Juanjuan Ren, Bingqiu Chen, Chun Wang, Zhi-Ying Huo, Yang Huang, Alberto Rebassa-Mansergas, Ning-Chen Sun, Haibo Yuan, Hua-Wei Zhang
Publikováno v:
Research in Astronomy and Astrophysics. 15:1209-1239
Accurate measurements of stellar metallicity gradients in the radial and vertical directions of the disk and their temporal variations provide important constraints on the formation and evolution of the Milky Way disk. We use 297 042 main sequence tu
Autor:
Yong Zhang, Yang Huang, Mao-Sheng Xiang, Ming Yang, Haibo Yuan, Juanjuan Ren, Chun Wang, Bingqiu Chen, Xiaowei Liu, Hua-Wei Zhang, Yue-Fei Wang, Ning-Chen Sun, Yong-Hui Hou
Using a sample of over 70, 000 red clump (RC) stars with $5$-$10$% distance accuracy selected from the LAMOST Spectroscopic Survey of the Galactic Anti-center (LSS-GAC), we study the radial and vertical gradients of the Galactic disk(s) mainly in the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9c6f99c47b2d655fbe8a991f86ec5767
http://arxiv.org/abs/1505.08065
http://arxiv.org/abs/1505.08065
Autor:
Ning-Chen Sun, Wei Zhang, Alberto Rebassa-Mansergas, Haibo Yuan, Juanjuan Ren, Xiaowei Liu, Zhi-Ying Huo, Mao-Sheng Xiang, Yue-Fei Wang, Yong-Hui Hou, Chun Wang, Hua-Wei Zhang, Saskia Hekker, Bingqiu Chen, Yang Huang, Yong Zhang
Asteroseismology allows for deriving precise values of surface gravity of stars. The accurate asteroseismic determinations now available for large number of stars in the Kepler fields can be used to check and calibrate surface gravities that are curr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e41eab89f935a6f647b9ed6abe887d6d
Autor:
Yang Huang, A-Li Luo, Hua Gao, Xiaowei Liu, Hua-Wei Zhang, Yue Wu, Guang-Wei Li, Mao-Sheng Xiang, Yong Zhang, Haotong Zhang, Bing Du
Recently the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) published its first data release (DR1), which is ranked as the largest stellar spectra dataset in the world so far. We combine the PASTEL catalog and SIMBAD radial veloci
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::628b4e0777fe607012598b71ff108039
Autor:
Hua-Wei Zhang, Gang Zhao
Publikováno v:
Chinese Journal of Astronomy and Astrophysics. 3:453-457
High-resolution, high signal-to-noise ratio spectra have been obtained for 32 metal-poor stars. The equivalent widths of Li λ6708 A were measured and the lithium abundances were derived. The average lithium abundance of 21 stars on the lithium plate
Publikováno v:
Chinese Astronomy and Astrophysics. 25:59-64
Based on high-resolution, high signal-to-noise ratio spectra, we have analysed the abundance of five α elements (Mg, Si, S, Ca, Ti) in 17 red clump giants. The results show that the giants can be divided into two categories, one metal-rich, with met
Autor:
Jianrong Shi, Haibo Yuan, Xiaowei Liu, Licai Deng, Huawei Zhang, Yong-Heng Zhao, Hua-Wei Zhang, Zhi-Ying Huo, Mao-Sheng Xiang, Gang Zhao, Yang Huang, J. L. Hou, A-Li Luo
As a major component of the LAMOST Galactic surveys, the LAMOST Spectroscopic Survey of the Galactic Anti-center (LSS-GAC) will survey a significant volume of the Galactic thin/thick disks and halo in a contiguous sky area of ~ 3,400sq.deg., centered
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::09cbdc69a8b62361d587ce9a4a22349e
http://arxiv.org/abs/1306.5376
http://arxiv.org/abs/1306.5376