Abstract
We present fifteen radial velocity (RV) measurements taken with FEROS for the astrometric binary candidate HD 113283 analyzed with the “exoplanet pipeline” and published in the nss_two_body_orbit table of Gaia Data Release 3. We have performed a periodogram analysis on the RVs and found no evidence of the stellar companion of mass m 2 > 0.15M ⊙. We discuss indications for the likely spurious astrometric two-body solution based on the Gaia products, including the comparably low significance, the small reduction of the astrometric excess noise after applying the two-body solution, inconsistent with the provided orbital solution, and the proximity of the orbital period to periods of known spurious solutions caused by Gaia's scanning law. We aim to contribute toward a refined solution filtering of the Gaia two-body solutions.
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