The Galactic Disk North–South Asymmetry in Metallicity May Be a New Tracer for the Disk Warp

• Published in: Astrophysical journal. Letters Vol. 978; no. 2; p. L24
• Main Authors: Sun, Weixiang, Shen, Han, Jiang, Biwei, Liu, Xiaowei
• Format: Journal Article
• Language: English
• Published: The American Astronomical Society 10.01.2025; IOP Publishing
• Subjects: Galaxy structure; Milky Way disk; Stellar abundances; Stellar kinematics

Galactic disk warp has been widely characterized by stellar distributions and stellar kinematics but has not been traced by stellar chemistry. Here, we use a sample with over 170,000 red clump (RC) stars selected from LAMOST and APOGEE first to establish a correlation between the north–south asymmet...