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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
Building a Radio AGN Sample from Cosmic Morning -- The Radio High-Redshift Quasar Catalog (RHzQCat): I. Catalog from SDSS Quasars and Radio Surveys at
Yingkang Zhang, Ruqiu Lin, Krisztina Perger +5
Radio-loud high-redshift quasars (RHRQs) provide crucial insights into the evolution of relativistic jets and their connection to the growth of supermassive black holes. Beyond the…