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Detecting and Characterizing Companions with a Calibrated Gaia DR2, DR3, and Hipparcos Catalog (G23H)

Authors: William Thompson, Dori Blakely, Jerry W. Xuan, Simon Blouin, Jingwen Zhang, Doug Johnstone, Jean-Baptiste Ruffio, Eric Nielsen, Jessica Speedie, Brendan P. Bowler, Alexandre Bouchard-Côté, Kyle Franson, Sarah Blunt, William Roberson, Ryan Cloutier, Andre Fogal, Kaitlyn Hessel, Christian Marois, Alexandra Rochon

William Thompson et al 2026 The Astronomical Journal 172 .

Provider: AAS Journals

Caption: Figure 11.

Astrometric velocity points for PDS 70, a source with no Hipparcos data available. By comparing the calibrated GDR2 proper motions, the GDR3–GDR2 scaled position differences, and the GDR3 proper motions, it would be possible to constrain the astrometric reflex motion of the star; we leave this analysis to future work.

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