Table 1.
Companion frequencies from this work and the literature.
| Primary | Secondary | [Fe/H] | Projected separation | Frequency | Reference(s) |
|---|---|---|---|---|---|
| (Sp. T.) | (dex) | (au) | (%) | ||
| FGK(a) | UCD | < − 1.5 | ∼102–∼104 | < 4.0 | This work |
| Young FGK | BD | ∼0 | 28–1590 |  |
Metchev & Hillenbrand (2009) |
| USco young star | UCD cand. | ∼0 | 400–9000 | ∼3 | Chinchilla et al. (2019) |
| Mixed star | UCD cand. | ... | 1000–24 000 | 2–4 | dal Ponte et al. (2020) |
| M | UCD | ∼ − 1.0 | 1000–140 000 |  |
González-Payo et al. (2021) |
| M | UCD | ∼ − 2.0 | 1000–140 000 | < 5.3 | González-Payo et al. (2021) |
| M | BD | ∼0 | Few–7500 | 1.3 ± 0.3 | Winters et al. (2019) |
| FGK | UCD | < − 1.5 | < 10 | < Few | This work, inferred from other studies |
| FGK | Star | < − 1.5 | ∼102–∼104 |  |
This work |
| FGK | Star | < − 1.6 | > 10 (> 300) | 20 (∼9) | Zinnecker et al. (2004), K flux ratio > 0.01 |
| FGK | Star | < − 1.5 | 8–10 000 | < 3 | Lodieu et al. (2025) |
| FG | Star | ∼ − 1.5 | 1000–10 000 | ∼1 | Hwang et al. (2021) |
| GKM | Star | < − 1.5 | 32–57 000 | 4.5 | Lodieu et al. (2025), Zapatero Osorio & Martín (2004) |
| KM | Star | < − 0.5 | > 100 | > 2.41 | Zhang et al. (2013) |
| KM | Star | < − 0.5 | > 100 | 14 | Jao et al. (2009) |
| FGKM | Star | metal-poor | 100–100 000 | 12.5 ± 1.9 | Ziegler et al. (2015) |
| M | UCD | metal-poor | Few–tens | ∼3 | Riaz et al. (2008), Lodieu et al. (2009) |
| M | BD | ... | < 2 | 0.3 | Gaia Collaboration (2023) |
| M | BD | ... | Few–tens | 2.3–2.8 | Dieterich et al. (2012), Bowler et al. (2015), Susemiehl & Meyer (2022) |
Notes. Groups with different physical properties are separated by horizontal lines. The values in parentheses were derived from the literature data. (a)Some of the targets have an ambiguous spectral type classification or an earlier classification from the literature, such as HD 340279, which was classified as early as A5 by Bidelman (1985) and then as F8 by Nesterov et al. (1995). According to the effective temperatures from 4600 to 6300 K of our targets, we generalised their types as FGK.
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