12 citations · 31 across the 13 of their papers we have counts for
13 papers
A pilot study on the CSST astrometric capability: Detecting astrometric binaries with Gaia synergy via simulated data
Shangyu Wen, Shilong Liao, Zhaoxiang Qi +8
Context. The China Space-station Survey Telescope (CSST) will provide deep, wide-field epoch astrometry during its 10-year mission. Astrometric binary orbits constrain the masses o…
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…
Refining the Gaia DR3 Parallax Zero-point: A Hybrid Approach Combining Global Parametric Correction with Local Refinement
Ye Ding, Shilong Liao, Zhaoxiang Qi +3
The Gaia Data Release 3 (GDR3) parallaxes are affected by a complex bias that depends on stellar magnitude, color, and celestial position, with amplitudes reaching tens of microarc…
Constraining the inclination of binary system orbits with the astrometric excess noise from Gaia DR3
Shilong Liao, Ye Ding, Shangyu Wen +2
Orbital inclination is crucial in determining the binary mass. The astrometric excess noise contains the orbital motion information, which can be used to constrain the inclination.…
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…
A pilot VLBI study of the SQUAB quasar sample featuring multiple Gaia detections
Yingkang Zhang, Tao An, Xiang Ji +5
Our previous work identified a class of SDSS quasars exhibiting multiple Gaia detections, classifying them as candidates for various astrophysical systems such as quasar-star pairs…
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…
DULAG: A DUal and Lensed AGN candidate catalog with GMP method
Qiqi Wu, M. Scialpi, Shilong Liao +2
Context. A series of studies have demonstrated that the Gaia multipeak method (GMP) is a very efficient technique to select active galactic nucleus (AGN) pair candidates. The numbe…
Analysis of Gaia Data Release 3 Parallax bias in the Galactic plane
Ye Ding, Shilong Liao, Qiqi Wu +2
The systematic errors are inevitable in Gaia published astrometric data. Lindegren et al. (L21) proposed a global recipe to correct for the GEDR3 parallax zero point offset, which…
Strange Quasar Candidates with Abnormal Astrometric Characteristics from Gaia EDR3 and SDSS (SQUAB-II): Optical Identifications
Xiang Ji, Zhen-Ya Zheng, Qiqi Wu +7
There are some strange quasars with multiple Gaia detections or observed with abnormal astrometric characteristics, such as with large proper motions or significant astrometric noi…
Simulation of CSSTs astrometric capability
Zhensen Fu, Zhaoxiang Qi, Shilong Liao +5
The China Space Station Telescope (CSST) will enter a low Earth orbit around 2024 and operate for 10 years, with seven of those years devoted to surveying the area of the median-to…
SQUAB I: The first release of Strange QUasar candidates with ABnormal astrometric characteristics from Gaia EDR3 and SDSS
Qi-Qi Wu, Shi-Long Liao, Xiang Ji +4
Given their extremely large distances and small apparent sizes, quasars are generally considered as objects with near-zero parallax and proper motion. However, some special quasars…
A catalog of quasar candidates identified by astrometric and mid-infrared methods in Gaia EDR3
Qiqi Wu, Shilong Liao, Zhaoxiang Qi +3
Quasars are very important in materializing the reference frame. The excess emission of AGNs (active galactic nuclei) in the mid infrared band can be used to identify quasar candid…