Kinematics of High-Velocity Stars Utilizing LAMOST and Gaia DR3 Archives within 100 kpc

TL;DR

This study analyzes the kinematic properties of high-velocity stars within 100 kpc using data from LAMOST and Gaia DR3, providing insights into their velocities, dispersions, and solar motion.

Contribution

It offers a comprehensive analysis of high-velocity star kinematics within 100 kpc using combined LAMOST and Gaia DR3 data, including velocity dispersions and solar motion estimation.

Findings

Determined spatial velocities (U, V, W) for high-velocity stars.

Measured velocity dispersions (sigma_1, sigma_2, sigma_3).

Estimated the solar motion based on star kinematics.

Abstract

The kinematic parameters identified from high-velocity stars situated within 100 kpc are examined and analyzed. We included three high velocity programs comprising 591, 87, and 519 stars as a function of distances ranging from 0.10 to nearly 109 kpc. In this analysis, we will determine the spatial velocities (U, V, W) in galactic coordinates along with their velocity dispersion (sigma_1, sigma_2, sigma_3), the convergent point (Ao, Do), and therefore, the solar motion (S_sun).