19 papers
The Shape of the Vertical Action Distribution Locates the Scatterers that Heat the Galactic Disc
Yuan-Sen Ting, Hans-Walter Rix
The Milky Way's stellar disc is thicker than the cold gas layer from which its stars form. What scatters stars onto orbits with greater vertical motion remains unresolved. Scattere…
HRMOS: A High-Resolution Multi-Object Spectrograph for the VLT
Laura Magrini, Thomas Bensby, Sofia Randich +174
This White Paper presents the scientific rationale and instrument concept for HRMOS (High-Resolution Multi-Object Spectrograph), a next-generation instrument proposed for the ESO V…
Towards Unveiling the Origins of the Milky Way Bulge through Multi-band-Messenger Sky Surveys
Hai-Feng Wang, Xiao Han, Giovanni Carraro +3
We analyze the structure and chemo-dynamical properties of the Galactic bulge using ab-type RR Lyrae stars (RRabs) from OGLE-IV and giant stars from APOGEE and Gaia. Orbital integr…
Variations in the Milky Way's Stellar Mass Function at [Fe/H] < -1
Jiadong Li, Hans-Walter Rix, Yuan-Sen Ting +14
We present the first determination of the Galactic stellar mass function (MF) for low-mass stars (0.2-0.5 M_sun) at metallicities [Fe/H] < -1. A sample of ~53,000 stars was selecte…
Towards Understanding the Milky Way's Matter Field and Dynamical Accretion History based on AI-GS3 Hunter
Hai-Feng Wang, Guan-Yu Wang, Giovanni Carraro +5
We present GS3 Hunter (Galactic-Seismology Substructures and Streams Hunter), a novel deep-learning method that combines Siamese Neural Networks and K-means clustering to identify…
SpecCLIP: Aligning and Translating Spectroscopic Measurements for Stars
Xiaosheng Zhao, Yang Huang, Guirong Xue +6
In recent years, large language models (LLMs) have transformed natural language understanding through vast datasets and large-scale parameterization. Inspired by this success, we p…