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astro-ph.GA2026
Optical-morphology-based assessment of astrometric quality in Gaia-CRF3 quasars
Qiqi Wu, Shilong Liao, Zhaoxiang Qi +3
Context. Several studies have shown that host-galaxy structure or extended optical morphology in AGNs can induce spurious parallaxes and proper motions in Gaia DR3. However, it rem…
astro-ph.GA2025
Characterizing the astrometric quality of AGNs in Gaia-CRF3
Shilong Liao, Qiqi Wu, Ye Ding +2
Active Galactic Nuclei (AGNs), owing to their great distances and compact sizes, serve as fundamental anchors for defining the celestial reference frame. With about 1.9 million AGN…