6 papers
The Milky Way's Early Disk Was Built in Bursts. II. The Multi-component Age-Metallicity Structure of the High- Disk
Tiancheng Sun, Maosheng Xiang, Jifeng Liu +2
Whether the high- disk experienced a continuous or episodic star-formation history remains an open question. Here we investigate the age--metallicity distribution of the high-$α…
Testing Chemical Tagging with LAMOST: Intrinsic Abundance Dispersion of Subgiant Stars in the Galactic Disk
Wu Yaqian, Xiang Maosheng, Zhao Gang +4
The scatter in elemental abundances among stars of similar age and metallicity reflects chemical inhomogeneity in their birth environments, making abundance scatter a key observabl…
A chemo-dynamical search for planet-candidate hosts of possible extragalactic origin
Sun Tiancheng, Chen Xunzhou, Xiang Maosheng +2
To date, all known exoplanetary systems have been identified around stars currently residing in the Milky Way, whereas planets formed in external galaxies remain largely unexplored…
Reconstructing Intrinsic Stellar Noise with Stellar Atmospheric Parameters and Chromospheric Activity
Jinghua Zhang, Maosheng Xiang, Jie Yu +9
Accurately characterizing intrinsic stellar photometric noise induced by stellar astrophysics, such as stellar activity, granulation, and oscillations, is of crucial importance for…
Relations of rotation and chromospheric activity to stellar age for FGK dwarfs from Kepler and LAMOST
Lifei Ye, Shaolan Bi, Jinghua Zhang +9
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…
Timing the formation of the Galactic thin disc with asteroseismic stellar ages
Wu Yaqian, Xiang Maosheng, Zhao Gang +3
The formation of the extended thin disc is the most spectacular event of our Galaxy in the past \,Gyr. To unveil this process, obtaining precise and accurate stellar ages fo…