A Spatially Dependent Correction of Gaia EDR3 Parallax Zero-point Offset based on 0.3 million LAMOST DR8 Giant Stars
Gaia EDR3 have released astrometric and photometric data for over 1.8 billion sources. Among of them, 1.468 billion sources have full astrometric data, including position, parallax, and proper motions. The data set of Gaia EDR3 is widely used in the fields of the stellar and Galactic astrophysics. In Gaia EDR3, the typical uncertainties of parallaxes are 0.03–1.4 mas for sta...