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2023RNAAS...7...12S - Research Notes of the AAS, 7, 12 (2023/January-0)

Non-confirmation of the Astrometric Binary Candidate HD 113283 Using FEROS Radial Velocities.

SPAETH D., REFFERT S., TRIFONOV T. and GOLOVIN A.

Abstract (from CDS):

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 nsstwobody_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 m2 > 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.

Abstract Copyright: © 2023. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Binary stars - Astrometric binary stars - Gaia - Radial velocity - Astrometry - High resolution spectroscopy - Spectroscopic binary stars

Simbad objects: 1

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