The Age–Velocity Dispersion Relations of the Galactic Disk as Revealed by the LAMOST-Gaia Red Clump Stars

• Published in: The Astrophysical journal Vol. 979; no. 2; pp. 103 - 110
• Main Authors: Sun, Weixiang, Shen, Han, Jiang, Biwei, Liu, Xiaowei
• Format: Journal Article
• Language: English
• Published: The American Astronomical Society 01.02.2025; IOP Publishing
• Subjects: Galaxy kinematics; Galaxy structure; Milky Way disk; Milky Way dynamics; Stellar abundances; Stellar kinematics

Using nearly 230,000 red clump stars selected from LAMOST and Gaia, we conduct a comprehensive analysis of the stellar age–velocity dispersion relations (AVRs) for various disk populations, within 5.0 ≤ R ≤ 15.0 kpc and ∣ Z ∣ ≤ 3.0 kpc. The AVRs of the whole red clump sample stars are accurately des...