A generative model for Gaia astrometric orbit catalogs: selection functions for binary stars, giant planets, and compact object companions [PDF]
The Open Journal of AstrophysicsAstrometry from {\it Gaia} DR3 has produced a sample of $\sim$170,000 Keplerian orbital solutions, with many more anticipated in the next few years.
Kareem El-Badry +6 more
doaj +7 more sources
Search for a Black Hole Binary in Gaia DR3 Astrometric Binary Stars with Spectroscopic Data [PDF]
The Astrophysical Journal, 2023 We report the discovery of a candidate binary system consisting of a black hole (BH) and a red giant branch star in Gaia DR3. This binary system was discovered from 64,108 binary solutions for which both astrometric and spectroscopic data are available ...
Ataru Tanikawa +5 more
doaj +6 more sources
Astrometric identification of nearby binary stars II: Astrometric binaries in the Gaia Catalogue of Nearby Stars [PDF]
Monthly Notices of the Royal Astronomical Society, 2022 Abstract We examine the capacity to identify binary systems from astrometric deviations alone. We apply our analysis to the Gaia eDR3 and DR2 data, specifically the Gaia Catalogue of Nearby Stars. We show we must renormalize (R)UWE over the local volume to avoid biasing local observations, giving a Local Unit Weight Error (LUWE).
Zephyr Penoyre +2 more
arxiv +5 more sources
Spectroscopic Follow-up of Gaia Exoplanet Candidates: Impostor Binary Stars Invade the Gaia DR3 Astrometric Exoplanet Candidates [PDF]
The Astronomical Journal, 2023 In this paper, we report on the follow-up of six potential exoplanets detected with Gaia astrometry and provide an overview of what is currently known about the nature of the entire Gaia astrometric exoplanet candidate sample, 72 systems in total.
Marcus L. Marcussen, Simon H. Albrecht
doaj +9 more sources
Astrometric Mass Ratios of 248 Long-period Binary Stars Resolved in Hipparcos and Gaia EDR3 [PDF]
The Astronomical Journal, 2021 Abstract Using the absolute astrometric positions and proper motions for common stars in the Hipparcos and Gaia catalogs separated by 24.75 yr in the mean epoch, we compute mass ratios for long-period, resolved binary systems without any astrophysical assumptions or dependencies, except the presence of inner binary subsystems that may ...
В. В. Макаров, C. Fabricius
semanticscholar +8 more sources
Astrometric identification of nearby binary stars – I. Predicted astrometric signals [PDF]
Monthly Notices of the Royal Astronomical Society, 2022 ABSTRACT We examine the capacity to identify binary systems from astrometric errors and deviations alone. Until the release of the fourth Gaia data release, we lack the full astrometric time-series that the satellite records, but as we show can still infer the presence of binaries from the best-fitting models, and their error, already ...
Zephyr Penoyre +2 more
semanticscholar +5 more sources
Astrometric Binary Classification via Artificial Neural Networks [PDF]
The Astrophysical JournalWith nearly two billion stars observed and their corresponding astrometric parameters evaluated in the recent Gaia mission, the number of astrometric binary candidates has risen significantly.
Joe Smith
doaj +4 more sources
Visual Binary Stars with Partially Missing Data: Introducing Multiple Imputation in Astrometric Analysis [PDF]
Publications of the Astronomical Society of the Pacific, 2019 Nine figures, six tables, 23 pages including three appendices. Accepted for publication in PASP.
Rubén M. Clavería +3 more
semanticscholar +7 more sources
An astrometric study of four binary stars [PDF]
Publications of the Astronomical Society of the Pacific, 1994 Completion of long-term astrometric plate series yields revised results on the orbits and parallaxes. The subdwarf mu Cas seems to be overluminous; the distance of the supergiant epsilon Aur is near 600 pc. The unresolved companion in the red dwarf pair BD +6degree398 is of very low mass, and the companion of BD +67degree552 massive but probably ...
W. D. Heintz, B. A. Cantor
semanticscholar +4 more sources
Astrometric and photometric measurements of binary stars with adaptive optics: observations from 2002 [PDF]
Monthly Notices of the Royal Astronomical Society, 2011 9 pages, 1 figure, 3 ...
Lewis C. Roberts
semanticscholar +6 more sources