66 citations · 786 across the 42 of their papers we have counts for
7 papers · 1 filter
Near-infrared chemical abundances of stars in the Sculptor dwarf galaxy
Baitian Tang, Jiajun Zhang, Zhiqiang Yan +3
Owing to the recent identification of major substructures in our Milky Way (MW), the astronomical community has started to reevaluate the importance of dissolved and existing dwarf…
Extended Tidal Tails of IC 4756 detected by {\it Gaia} EDR3
Xianhao Ye, Jinkun Zhao, Jiajun Zhang +2
We report the discovery of emerged tidal tails around open cluster IC 4756 ( 1 Gyr) based on 644 members identified from {\it Gaia} EDR3. Three-dimensional spatial positions,…
Tracing the Origin of Moving Groups. III. Detecting Moving Groups in The LAMOST DR7
Yong Yang, Jingkun Zhao, Jiajun Zhang +2
We revisit the moving groups (MGs) in the solar neighborhood with a sample of 91969 nearby stars constructed from LAMOST DR7. Using the wavelet technique and Monte Carlo simulation…
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…
Emergent gravity fails to explain color-dependent galaxy-galaxy lensing signals from SDSS Dr7
Wentao Luo, Jiajun Zhang, Vitali Halenka +6
We test the Emergent Gravity(EG) theory using the galaxy-galaxy lensing technique based on SDSS DR7 data. In the EG scenario, we do not expect color dependence of the galaxy sample…
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…