Mapping the Galactic Disk with the LAMOST and Gaia Red Clump Sample. VII. The Stellar Disk Structure Revealed by the Mono-abundance Populations

Using a sample of 96,201 primary red clump (RC) stars selected from the LAMOST and Gaia surveys, we investigate stellar structure Galactic disk. The show two separated sequences high-[{\alpha}/Fe] low-[{\alpha}/Fe] in [{\alpha}/Fe]-[Fe/H] plane. We divide into five mono-abundance populations (MAPs) with different ranges [{\alpha}/Fe] [Fe/H], named as high-[{\alpha}/Fe], & high-[Fe/H], low-[Fe/H], solar, high-[Fe/H] MAPs respectively. present number density distributions R Z plane, scale heights lengths individual by fitting their vertical radial profiles. profiles, variation trend height Galactocentric radius, indicate that there is clear disk flare outer both for MAPs. While surface profiles peak radius 7 kpc 8 MAPs, also correlation between mean rotation velocity metallicity find velocities are well trends At last, discuss character MAP it more similar to either or velocity.