70 citations · 472 across the 20 of their papers we have counts for
10 papers · 1 filter
Revisit NGC 5466 Tidal Stream with , SDSS/SEGUE and LAMOST
Yong Yang, Jing-Kun Zhao, Miho N. Ishigaki +5
By mining the data from EDR3, SDSS/SEGUE DR16 and LAMOST DR8, 11 member stars of the NGC 5466 tidal stream are detected and 7 of them are newly identified. To reject contami…
High-α-Metal-Rich stars in the LAMOST-MRS survey and its connection with the galactic bulge
Haopeng Zhang, Yuqin Chen, Gang Zhao +6
We report the detection of a large sample of high--metal-rich stars on the low giant branch with dex in the LAMOST-MRS survey. This special group corresponds to a…
Partitioning the Galactic Halo with Gaussian Mixture Models
Xilong Liang, Yuqin Chen, Jingkun Zhao +1
The Galactic halo is supposed to form from merging with nearby dwarf galaxies. In order to probe different components of the Galactic halo, we have applied the Gaussian Mixture Mod…
Nearly 30,000 late-type main-sequence stars with stellar age from LAMOST DR5
Jiajun Zhang, Jingkun Zhao, Terry D. Oswalt +3
We construct a sample of nearly 30,000 main-sequence stars with 4500K 5000K and stellar ages estimated by the chromospheric activityage relation. This sample is u…
A new moving group in the Local Arm
Xilong Liang, Jingkun Zhao, Yuqin Chen +5
We present a new moving group clustered in kinematics, spatial position and elemental abundances. Its spatial position is around the center of the Local Arm of the Milky Way. A con…
Is NGC 5824 the Core of the Progenitor of the Cetus Stream?
Jiang Chang, Zhen Yuan, Xiang-Xiang Xue +5
A large number of new members (150) of the Cetus Stream (CS) were identified from their clustering features in dynamical space using 6D kinematic data by combining LAMOST DR5…
Elemental abundances distributions in (R, ) plane with LAMOST DR5 and Gaia DR2
Xilong Liang, Jingkun Zhao, Yuqin Chen +4
Since Gaia DR2 was released, many velocity structures in the disk have been revealed such as large scale ridge-like patterns in the phase space. Both kinematic information and stel…
A Hint of Three-section Halo as Seen from the APOGEE DR14
Y. Q. Chen, G. Zhao, X. X. Xue +4
Based on the [Fe/H] versus [Mg/Fe] diagram and distances from APOGEE data release 14, we compare the spatial distributions, the l-Vlos diagram and the abundance gradients between h…
On the radial metallicity gradient and radial migration effect of the Galactic disk
Yunpeng Jia, Yuqin Chen, Gang Zhao +4
We study the radial metallicity gradient as a function of [Mg/Fe] and with the help of a guiding radius based on the Apache Point Observatory Galactic Evolution…
A Catalog of Moving Group Candidates in The Solar Neighborhood
Jingkun Zhao, Gang Zhao, Yuqin Chen
Based on the kernel estimator and wavelet technique, we have identified 22 moving group candidates in the solar neighborhood from a sample which includes around 14,000 dwarfs and 6…