9 papers
Probabilistic Stellar Age Estimation for Gaia XP Stars with NGBoost
Xiaokun Hou, Wenbo Wu, Gang Zhao +2
Stellar age is a fundamental quantity for Galactic archaeology, but reliable age estimation for large stellar samples remains challenging. In this work, we develop an uncertainty a…
Milky Way Dynamics Favor Dark Matter over Modified Gravity Models
Zheng-long Wang, Yue-Lin Sming Tsai, Lan Zhang +5
Modified gravity theories such as Modified Newtonian Dynamics (MOND) and Scalar-Tensor-Vector Gravity (STVG) have been proposed as alternatives to dark matter, but decisive tests h…
Proton-rich production of lanthanides: the process
Xilu Wang, Amol V. Patwardhan, Yangming Lin +7
The astrophysical origin of the lanthanides is an open question in nuclear astrophysics. Besides the widely studied , , and processes in moderately-to-strongly neutron-ri…
HR-GO II: chemical abundances of low- retrograde dynamically-tagged-groups: Revealing Thamnos as a very metal-poor substructure
Renjing Xie, Zhen Yuan, Haining Li +12
Milky Way halo substructures identified in dynamical space are known to suffer from contamination from the Milky Way in-situ stars, which makes their accreted origins uncertain. We…
Milky Way Mass Through Escape Velocity Curve from LAMOST K Giants
Yin Wu, Haining Li, Yang Huang +2
Escape velocity has long been used to constrain the mass of the Dark Matter (DM) halo in the Milky Way (MW). Here we present a study of the escape velocity curve using a sample of…
Where are the Population III star relics in the simulated Milky Way analogues?
Hang Yang, Liang Gao, Qi Guo +3
Using 6 Milky Way analogues with two different numerical resolutions from the Auriga simulation, we investigate the total mass, spatial distribution and kinematics of the Populatio…