Table 1
Properties of the sample.
| Target | d (pc) | M✱ (M⊙) | Mdust (M⊕) | log Ṁacc (M⊙ yr−1) | Age (Myr) | Binary |
|---|---|---|---|---|---|---|
| CHX 18 N | 191.6 ± 0.03 | 0.9 | 13 | −7.52 | 0.8–1.0 | (*) |
| CHX 22 | 191.2 (1) | 1.9±0.1/0.6±0.1 | <1 | <−4.8 | 2.8–3.3 | (**) |
| CR Cha | 185.2 ± 0.4 | 1.4±0.1 | 198 | −8.41 | 0.8–1.0 | (*) |
| CS Cha | 190 (2) | 1.3±0.1/0.6±0.1 | 84 | −7.99 | 3.0–5.3 | (**)* |
| CT Cha | 190.0 ± 0.4 | 0.9±0.2 | 50 | −6.53 | 1.2–1.9 | (*)* |
| CV Cha | 191.8 ± 0.5 | 2.1±0.2 | 29 | −7.26 | 1.3–1.5 | (*) |
| DI Cha | 189.0 ± 0.6 | 2.3±0.2 | 9 | −7.39 | 0.6–0.9 | (*)* + ** |
| HD97048 | 184.4 ± 0.7 | 2.4±0.2 | 940 | <−7.72 | 3.6–4.4 | (*) |
| HP Cha | 187.3±1.3 | 1.7±0.1 | 80 | <−5.63 | 5.2–5.7 | (*)(**) |
| PDS 51 | 190 (2) | 0.9±0.1/0.7±0.1 | 2 | −7.80 | 2.5–3.9 | (**) |
| RX J1106.3-7721 | 177.9 (1) | 2.9±0.3 | - | − | 1.0–1.4 | (*) |
| SYCha | 180.7 ± 0.4 | 0.7±0.1 | 50 | <−4.66 | 1.5–2.0 | (*) |
| Sz 41 | 191.8 ± 0.4 | 0.6±0.1/0.5±0.1 | <1 | −7.38 | 0.4–0.7 | (*)* |
| Sz 45 | 188.9 ± 0.6 | 0.6±0.1 | 10 | −8.02 | 1.6–2.2 | (*) |
| SZ Cha | 190.2 ± 0.9 | 1.5±0.1 | 150 | −7.56 | 1.5–1.8 | (*)* |
| TW Cha | 183.1 ± 0.4 | 0.7±0.1 | 23 | −8.56 | 1.5–2.2 | (*) |
| VZ Cha | 191.1 ± 0.6 | 0.5±0.1 | 60 | −7.14 | 1.1–1.5 | (*) |
| WW Cha | 188.8 ± 1.0 | 1.9±0.1 | 630 | −6.28 | 0.2–0.5 | (**) |
| WX Cha | 190.6 (1) | 0.5±0.1 | 10 | −6.69 | 0.9–1.2 | (*)* |
| WY Cha | 174.5 (1) | 0.7±0.1 | 3 | −8.36 | 1.5–2.1 | (*)* + * |
Notes. Columns are: target name, distance from Gaia DR3, stellar mass, a crude estimate of the disk dust mass, mass accretion rate, age, and possible multiplicity of the target. The detailed derivation of these parameters is described in Sect. 2. The known multiplicity status of each system is indicated in the last column. Brackets denote circumstellar or circumbinary disks. Stars with a plus sign (+) indicate known wide companions, while stars without this sign indicate close companions.(1) The Gaia parallactic measurement has a large renormalized unit weighting error (RUWE ≫ 2) pointing to a very uncertain solution.(2) No Gaia parallax is calculated, and a value of 190 pc is adopted.
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