Binary parameters from astrometric and spectroscopic errors–candidate hierarchical triples and massive dark companions in Gaia DR3

@article{Andrew2022BinaryPF,
  title={Binary parameters from astrometric and spectroscopic errors–candidate hierarchical triples and massive dark companions in Gaia DR3},
  author={Shion Andrew and Zephyr Penoyre and Vasily A Belokurov and N. Wyn Evans and Semyeong Oh},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2022}
}
We show how astrometric and spectroscopic errors introduced by an unresolved binary system can be combined to give estimates of the binary period and mass ratio. This can be performed analytically if we assume we see one or more full orbits over our observational baseline, or numerically for all other cases. We apply this method to Gaia DR3 data, combining the most recent astrometric and spectroscopic data. We compare inferred periods and mass ratios calculated using our method with orbital… 

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Same as Figure 9, except with our bronze candidate sample. Sources in our original gold sample (5) are color-coded gold in the leftmost column and are given an outline in all other plots

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