Zobrazeno 1 - 10
of 114
pro vyhledávání: '"Shaolan, Bi"'
The formation of the extended thin disc is the most spectacular event of our Galaxy in the past $\sim8$\,Gyr. To unveil this process, obtaining precise and accurate stellar ages for a large sample of stars is essential although challenging. In this w
Externí odkaz:
http://arxiv.org/abs/2301.07990
Autor:
Jinghua Zhang, Maosheng Xiang, Jie Yu, Jian Ge, Ji-Wei Xie, Hui Zhang, Yaguang Li, You Wu, Chun-Qian Li, Shaolan Bi, Hong-Liang Yan, Jian-Rong Shi
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 272, Iss 2, p 40 (2024)
Accurately characterizing the intrinsic stellar photometric noise induced by stellar astrophysics, such as stellar activity, granulation, and oscillations, is of crucial importance for detecting transiting exoplanets. In this study, we investigate th
Externí odkaz:
https://doaj.org/article/55b90e67d8ae4c0cae7179854b8c5bbd
Autor:
Lifei Ye, Shaolan Bi, Jinghua Zhang, Tiancheng Sun, Liu Long, Zhishuai Ge, Tanda Li, Xianfei Zhang, Xunzhou Chen, Yaguang Li, Jianzhao Zhou, Maosheng Xiang
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 271, Iss 1, p 19 (2024)
The empirical relations between rotation period, chromospheric activity, and age can be used to estimate stellar age. To calibrate these relations, we present a catalog, including the masses and ages of 52,321 FGK dwarfs, 47,489 chromospheric activit
Externí odkaz:
https://doaj.org/article/edcfe9b35a4548ba9eba9608fa830597
Autor:
Jianzhao Zhou, Shaolan Bi, Jie Yu, Yaguang Li, Xianfei Zhang, Tanda Li, Liu Long, Mengjie Li, Tiancheng Sun, Lifei Ye
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 271, Iss 1, p 17 (2024)
Based on all 2 minute cadence TESS light curves from Sector 1 to 60, we provide a catalog of 8651 solar-like oscillators, including frequency at maximum power ( ${\nu }_{\max }$ , with its median precision σ = 5.39%), large frequency separation (Δ
Externí odkaz:
https://doaj.org/article/d2f526a047dc439f9b1f1ae921bb40ad
Autor:
Guang-Yao Xiao, Huan-Yu Teng, Jianzhao Zhou, Bun’ei Sato, Yu-Juan Liu, Shaolan Bi, Takuya Takarada, Masayuki Kuzuhara, Marc Hon, Liang Wang, Masashi Omiya, Hiroki Harakawa, Fei Zhao, Gang Zhao, Eiji Kambe, Hideyuki Izumiura, Hiroyasu Ando, Kunio Noguchi, Wei Wang, Meng Zhai, Nan Song, Chengqun Yang, Tanda Li, Timothy D. Brandt, Michitoshi Yoshida, Yoichi Itoh, Eiichiro Kokubo
Publikováno v:
The Astronomical Journal, Vol 167, Iss 2, p 59 (2024)
We present the discoveries of two giant plants orbiting the red-giant-branch star HD 112570 and the red-clump star HD 154391, based on the radial-velocity (RV) measurements from the Xinglong station and Okayama Astrophysical Observatory. Spectroscopi
Externí odkaz:
https://doaj.org/article/2fddf3752d464a048cb25d515ceb9460
Publikováno v:
Universe, Vol 9, Iss 11, p 457 (2023)
In order to derive sodium abundances and investigate the effects of non-local thermodynamic equilibrium (NLTE) on the formation of H-band Na I lines, we update the sodium atomic model by incorporating collision rates with hydrogen from new quantum-me
Externí odkaz:
https://doaj.org/article/73398996ae0641a0bfe2230c8faeaf47
Publikováno v:
The Astrophysical Journal, Vol 959, Iss 1, p 24 (2023)
Blue large-amplitude pulsators (BLAPs) are hot low-mass stars that show large-amplitude light variations likely due to radial oscillations driven by iron group opacities. Period changes provide evidence of both secular contraction and expansion among
Externí odkaz:
https://doaj.org/article/14143e0cada94cb4bc311b838e3299eb
Autor:
Liu Long, Shaolan Bi, Jinghua Zhang, Xianfei Zhang, Liyun Zhang, Zhishuai Ge, Tanda Li, Xunzhou Chen, YaGuang Li, LiFei Ye, TianCheng Sun, JianZhao Zhou
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 268, Iss 1, p 30 (2023)
Using data from Gaia Data Release 3 and Kepler/K2, we present a catalog of 16 open clusters with ages ranging from 4–4000 Myr that provides detailed information on membership, binary systems, and rotation. We assess the memberships in 5D phase spac
Externí odkaz:
https://doaj.org/article/80282b9257d24ee69b79e1a480d5f0d0
Autor:
Tiancheng Sun, Zhishuai Ge, Xunzhou Chen, Shaolan Bi, Tanda Li, Xianfei Zhang, Yaguang Li, Yaqian Wu, Sarah A. Bird, J. W. Ferguson, Jianzhao Zhou, Lifei Ye, Liu Long, Jinghua Zhang
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 268, Iss 1, p 29 (2023)
Varying oxygen abundance could impact modeling-inferred ages. This work aims to estimate the ages of dwarfs considering observed oxygen abundance. To characterize 67,503 LAMOST and 4006 GALAH FGK-type dwarf stars, we construct a grid of stellar model
Externí odkaz:
https://doaj.org/article/a5a4ac91696e4833a3b3bb820a38e4e1
Publikováno v:
The Astrophysical Journal, Vol 953, Iss 2, p 182 (2023)
This paper reports the estimated stellar parameters of 1153 Kepler red giant branch stars determined with asteroseismic modeling. We use radial-mode oscillation frequencies, gravity-mode period spacings, Gaia luminosities, and spectroscopic data to c
Externí odkaz:
https://doaj.org/article/c88ff314a06e4714b4896b67e39ce9bc