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Gaia early data release 3 (EDR3) provides about 1.6 million QSO-like objects. With such a huge number of confirmed quasars, these QSOs will play an extremely important role in materializing the next generation of kinematically non-rotating reference frames in optical wavelength. Measuring the systematic residuals of the quasars convincingly in Gaia EDR3 is paramount for further fundamental astronomy use. In this talk, I will present the overall astrometric properties of these quasars with respect to their distribution in the sky, magnitude, and color distribution.
Liao Shi-long’s personal information:
Associate Researcher, member of the Youth Innovation Promotion Association, CAS. After receiving my Ph.D. in Astrometry from the University of Chinese Academy of Science in 2016, I joined the Center for Astro-Geodynamics，Shanghai Astronomical Observatory (SHAO, CAS).
Research interests:
My personal research interests focus on Astrometry and its application; Astrometric catalog analysis; Definition and realization of reference system ICRS in visible band; Search and characterization of compact binaries using Gaia astrometric data. I have worked on the space astrometric mission Gaia since 2014, and become a member of the astrometry coordinate unit 3 (CU3) since 2015. Now I am also working on the Astrometry Science and Data Analysis of the China Space Station Telescope Project.