Table 2.
Open in new tab

Median observational parameters of the small clusters recovered in the Small Structure regime with the 16th and 84th percentiles. The first column is the identifier related to Fig. 8. |$N_T$| corresponds to the total number of star in the main sample and with RV in parenthesis. The last column shows the references that have studied the clusters using Gaia data. Median RV value is calculated if the cluster has at least six stars with available information.

ClusterName|$\bar{\alpha }$| (deg)|$\bar{\delta }$| (deg)|$\bar{\varpi }$| (mas)|$\bar{\mu }_\alpha ^{*}$| (⁠|$\rm {mas}\ yr^{-1}$|⁠)|$\bar{\mu }_\delta$| (⁠|$\rm {mas}\ yr^{-1}$|⁠)|$\overline{RV}$| (⁠|$\rm {km}\ s^{-1}$|⁠)|$N_T$| (with RV)References
a|$\lambda$| Ori South A85.96|$^{+1.16}_{-1.77}$|6.54|$^{+1.17}_{-1.94}$|2.29|$^{+0.10}_{-0.08}$||$-$|2.99|$^{+0.58}_{-0.48}$||$-$|1.47|$^{+0.54}_{-0.32}$|–136 (1)2, 3
b|$\lambda$| Ori South Ba79.41|$^{+0.43}_{-0.98}$|7.39|$^{+1.60}_{-0.37}$|2.64|$^{+0.14}_{-0.13}$|2.33|$^{+0.28}_{-0.30}$||$-$|3.66|$^{+0.37}_{-0.24}$|–72 (3)2
cL156275.93|$^{+2.89}_{-0.36}$|12.85|$^{+0.38}_{-2.82}$|3.26|$^{+0.21}_{-0.13}$|1.67|$^{+0.34}_{-0.29}$||$-$|3.50|$^{+0.21}_{-0.38}$|–75 (0)2
dL1622a87.52|$^{+0.10}_{-0.09}$|2.82|$^{+0.17}_{-0.33}$|2.53|$^{+0.04}_{-0.10}$||$-$|1.13|$^{+0.28}_{-0.19}$||$-$|1.83|$^{+0.20}_{-0.14}$|–51 (0)1, 2
eOBP-West81.46|$^{+0.48}_{-0.40}$|0.36|$^{+1.03}_{-0.60}$|2.44|$^{+0.05}_{-0.05}$|0.06|$^{+0.30}_{-0.28}$|1.35|$^{+0.23}_{-0.23}$|27.60|$^{+0.70}_{-1.46}$|58 (19)2
fL1616 Ab79.82|$^{+0.67}_{-0.58}$||$-$|1.25|$^{+0.71}_{-0.60}$|2.81|$^{+0.07}_{-0.09}$|1.52|$^{+0.10}_{-0.10}$||$-$|0.46|$^{+0.13}_{-0.18}$|20.92|$^{+1.23}_{-0.83}$|83 (9)2, 3
gL1616 Bb77.21|$^{+0.53}_{-0.39}$||$-$|2.96|$^{+0.46}_{-0.38}$|2.65|$^{+0.05}_{-0.06}$|1.22|$^{+0.19}_{-0.21}$||$-$|0.78|$^{+0.25}_{-0.38}$|22.54|$^{+1.65}_{-0.42}$|67 (7)2, 3
hL163480.82|$^{+0.48}_{-0.40}$||$-$|4.27|$^{+0.54}_{-0.49}$|2.68|$^{+0.08}_{-0.04}$|1.85|$^{+0.21}_{-0.20}$||$-$|1.02|$^{+0.24}_{-0.18}$|–88 (1)2, 3
iRigel79.03|$^{+0.59}_{-0.93}$||$-$|6.57|$^{+1.25}_{-1.58}$|3.46|$^{+0.09}_{-0.18}$|1.72|$^{+0.27}_{-0.34}$||$-$|2.90|$^{+0.28}_{-0.230}$|–67 (0)2, 3
jOrion A East87.26|$^{+1.00}_{-0.59}$||$-$|5.27|$^{+0.62}_{-0.57}$|2.30|$^{+0.09}_{-0.06}$||$-$|2.45|$^{+0.16}_{-0.27}$|0.31|$^{+0.14}_{-0.26}$|–54 (1)2, 3
kOBP-Centrec84.70|$^{+0.67}_{-0.43}$||$-$|0.65|$^{+0.71}_{-1.22}$|2.50|$^{+0.07}_{-0.05}$||$-$|0.03|$^{+0.24}_{-0.40}$||$-$|0.61|$^{+0.24}_{-0.55}$|28.05|$^{+2.76}_{-2.59}$|79 (19)–
lOBP-Southc82.29|$^{+0.56}_{-0.97}$||$-$|3.08|$^{+0.83}_{-1.27}$|3.01|$^{+0.03}_{-0.06}$|1.10|$^{+0.15}_{-0.09}$||$-$|0.25|$^{+0.07}_{-0.10}$|20.38|$^{+9.25}_{-0.69}$|51 (7)–
mOri Far Westc77.85|$^{+0.83}_{-0.53}$||$-$|4.09|$^{+1.11}_{-1.40}$|2.93|$^{+0.10}_{-0.08}$|0.34|$^{+0.22}_{-0.12}$||$-$|1.29|$^{+0.28}_{-0.28}$|18.80|$^{+2.88}_{-3.31}$|68 (6)–
nOBP-Eastc86.81|$^{+1.28}_{-1.10}$||$-$|1.35|$^{+1.83}_{-1.84}$|2.19|$^{+0.10}_{-0.13}$|2.21|$^{+1.00}_{-1.73}$||$-$|4.11|$^{+0.46}_{-0.54}$|18.62|$^{+0.89}_{-0.69}$|91 (6)–
ClusterName|$\bar{\alpha }$| (deg)|$\bar{\delta }$| (deg)|$\bar{\varpi }$| (mas)|$\bar{\mu }_\alpha ^{*}$| (⁠|$\rm {mas}\ yr^{-1}$|⁠)|$\bar{\mu }_\delta$| (⁠|$\rm {mas}\ yr^{-1}$|⁠)|$\overline{RV}$| (⁠|$\rm {km}\ s^{-1}$|⁠)|$N_T$| (with RV)References
a|$\lambda$| Ori South A85.96|$^{+1.16}_{-1.77}$|6.54|$^{+1.17}_{-1.94}$|2.29|$^{+0.10}_{-0.08}$||$-$|2.99|$^{+0.58}_{-0.48}$||$-$|1.47|$^{+0.54}_{-0.32}$|–136 (1)2, 3
b|$\lambda$| Ori South Ba79.41|$^{+0.43}_{-0.98}$|7.39|$^{+1.60}_{-0.37}$|2.64|$^{+0.14}_{-0.13}$|2.33|$^{+0.28}_{-0.30}$||$-$|3.66|$^{+0.37}_{-0.24}$|–72 (3)2
cL156275.93|$^{+2.89}_{-0.36}$|12.85|$^{+0.38}_{-2.82}$|3.26|$^{+0.21}_{-0.13}$|1.67|$^{+0.34}_{-0.29}$||$-$|3.50|$^{+0.21}_{-0.38}$|–75 (0)2
dL1622a87.52|$^{+0.10}_{-0.09}$|2.82|$^{+0.17}_{-0.33}$|2.53|$^{+0.04}_{-0.10}$||$-$|1.13|$^{+0.28}_{-0.19}$||$-$|1.83|$^{+0.20}_{-0.14}$|–51 (0)1, 2
eOBP-West81.46|$^{+0.48}_{-0.40}$|0.36|$^{+1.03}_{-0.60}$|2.44|$^{+0.05}_{-0.05}$|0.06|$^{+0.30}_{-0.28}$|1.35|$^{+0.23}_{-0.23}$|27.60|$^{+0.70}_{-1.46}$|58 (19)2
fL1616 Ab79.82|$^{+0.67}_{-0.58}$||$-$|1.25|$^{+0.71}_{-0.60}$|2.81|$^{+0.07}_{-0.09}$|1.52|$^{+0.10}_{-0.10}$||$-$|0.46|$^{+0.13}_{-0.18}$|20.92|$^{+1.23}_{-0.83}$|83 (9)2, 3
gL1616 Bb77.21|$^{+0.53}_{-0.39}$||$-$|2.96|$^{+0.46}_{-0.38}$|2.65|$^{+0.05}_{-0.06}$|1.22|$^{+0.19}_{-0.21}$||$-$|0.78|$^{+0.25}_{-0.38}$|22.54|$^{+1.65}_{-0.42}$|67 (7)2, 3
hL163480.82|$^{+0.48}_{-0.40}$||$-$|4.27|$^{+0.54}_{-0.49}$|2.68|$^{+0.08}_{-0.04}$|1.85|$^{+0.21}_{-0.20}$||$-$|1.02|$^{+0.24}_{-0.18}$|–88 (1)2, 3
iRigel79.03|$^{+0.59}_{-0.93}$||$-$|6.57|$^{+1.25}_{-1.58}$|3.46|$^{+0.09}_{-0.18}$|1.72|$^{+0.27}_{-0.34}$||$-$|2.90|$^{+0.28}_{-0.230}$|–67 (0)2, 3
jOrion A East87.26|$^{+1.00}_{-0.59}$||$-$|5.27|$^{+0.62}_{-0.57}$|2.30|$^{+0.09}_{-0.06}$||$-$|2.45|$^{+0.16}_{-0.27}$|0.31|$^{+0.14}_{-0.26}$|–54 (1)2, 3
kOBP-Centrec84.70|$^{+0.67}_{-0.43}$||$-$|0.65|$^{+0.71}_{-1.22}$|2.50|$^{+0.07}_{-0.05}$||$-$|0.03|$^{+0.24}_{-0.40}$||$-$|0.61|$^{+0.24}_{-0.55}$|28.05|$^{+2.76}_{-2.59}$|79 (19)–
lOBP-Southc82.29|$^{+0.56}_{-0.97}$||$-$|3.08|$^{+0.83}_{-1.27}$|3.01|$^{+0.03}_{-0.06}$|1.10|$^{+0.15}_{-0.09}$||$-$|0.25|$^{+0.07}_{-0.10}$|20.38|$^{+9.25}_{-0.69}$|51 (7)–
mOri Far Westc77.85|$^{+0.83}_{-0.53}$||$-$|4.09|$^{+1.11}_{-1.40}$|2.93|$^{+0.10}_{-0.08}$|0.34|$^{+0.22}_{-0.12}$||$-$|1.29|$^{+0.28}_{-0.28}$|18.80|$^{+2.88}_{-3.31}$|68 (6)–
nOBP-Eastc86.81|$^{+1.28}_{-1.10}$||$-$|1.35|$^{+1.83}_{-1.84}$|2.19|$^{+0.10}_{-0.13}$|2.21|$^{+1.00}_{-1.73}$||$-$|4.11|$^{+0.46}_{-0.54}$|18.62|$^{+0.89}_{-0.69}$|91 (6)–

Notes. a Clusters recovered by Chen et al. (2020) only with one clustering algorithm.

b

Clusters recovered by Chen et al. (2020) as one only group.

c

Clusters reported as possible new discoveries.

References: (1) Kounkel et al. (2018), (2) Chen et al. (2020), (3) Swiggum et al. (2021).

Table 2.
Open in new tab

Median observational parameters of the small clusters recovered in the Small Structure regime with the 16th and 84th percentiles. The first column is the identifier related to Fig. 8. |$N_T$| corresponds to the total number of star in the main sample and with RV in parenthesis. The last column shows the references that have studied the clusters using Gaia data. Median RV value is calculated if the cluster has at least six stars with available information.

ClusterName|$\bar{\alpha }$| (deg)|$\bar{\delta }$| (deg)|$\bar{\varpi }$| (mas)|$\bar{\mu }_\alpha ^{*}$| (⁠|$\rm {mas}\ yr^{-1}$|⁠)|$\bar{\mu }_\delta$| (⁠|$\rm {mas}\ yr^{-1}$|⁠)|$\overline{RV}$| (⁠|$\rm {km}\ s^{-1}$|⁠)|$N_T$| (with RV)References
a|$\lambda$| Ori South A85.96|$^{+1.16}_{-1.77}$|6.54|$^{+1.17}_{-1.94}$|2.29|$^{+0.10}_{-0.08}$||$-$|2.99|$^{+0.58}_{-0.48}$||$-$|1.47|$^{+0.54}_{-0.32}$|–136 (1)2, 3
b|$\lambda$| Ori South Ba79.41|$^{+0.43}_{-0.98}$|7.39|$^{+1.60}_{-0.37}$|2.64|$^{+0.14}_{-0.13}$|2.33|$^{+0.28}_{-0.30}$||$-$|3.66|$^{+0.37}_{-0.24}$|–72 (3)2
cL156275.93|$^{+2.89}_{-0.36}$|12.85|$^{+0.38}_{-2.82}$|3.26|$^{+0.21}_{-0.13}$|1.67|$^{+0.34}_{-0.29}$||$-$|3.50|$^{+0.21}_{-0.38}$|–75 (0)2
dL1622a87.52|$^{+0.10}_{-0.09}$|2.82|$^{+0.17}_{-0.33}$|2.53|$^{+0.04}_{-0.10}$||$-$|1.13|$^{+0.28}_{-0.19}$||$-$|1.83|$^{+0.20}_{-0.14}$|–51 (0)1, 2
eOBP-West81.46|$^{+0.48}_{-0.40}$|0.36|$^{+1.03}_{-0.60}$|2.44|$^{+0.05}_{-0.05}$|0.06|$^{+0.30}_{-0.28}$|1.35|$^{+0.23}_{-0.23}$|27.60|$^{+0.70}_{-1.46}$|58 (19)2
fL1616 Ab79.82|$^{+0.67}_{-0.58}$||$-$|1.25|$^{+0.71}_{-0.60}$|2.81|$^{+0.07}_{-0.09}$|1.52|$^{+0.10}_{-0.10}$||$-$|0.46|$^{+0.13}_{-0.18}$|20.92|$^{+1.23}_{-0.83}$|83 (9)2, 3
gL1616 Bb77.21|$^{+0.53}_{-0.39}$||$-$|2.96|$^{+0.46}_{-0.38}$|2.65|$^{+0.05}_{-0.06}$|1.22|$^{+0.19}_{-0.21}$||$-$|0.78|$^{+0.25}_{-0.38}$|22.54|$^{+1.65}_{-0.42}$|67 (7)2, 3
hL163480.82|$^{+0.48}_{-0.40}$||$-$|4.27|$^{+0.54}_{-0.49}$|2.68|$^{+0.08}_{-0.04}$|1.85|$^{+0.21}_{-0.20}$||$-$|1.02|$^{+0.24}_{-0.18}$|–88 (1)2, 3
iRigel79.03|$^{+0.59}_{-0.93}$||$-$|6.57|$^{+1.25}_{-1.58}$|3.46|$^{+0.09}_{-0.18}$|1.72|$^{+0.27}_{-0.34}$||$-$|2.90|$^{+0.28}_{-0.230}$|–67 (0)2, 3
jOrion A East87.26|$^{+1.00}_{-0.59}$||$-$|5.27|$^{+0.62}_{-0.57}$|2.30|$^{+0.09}_{-0.06}$||$-$|2.45|$^{+0.16}_{-0.27}$|0.31|$^{+0.14}_{-0.26}$|–54 (1)2, 3
kOBP-Centrec84.70|$^{+0.67}_{-0.43}$||$-$|0.65|$^{+0.71}_{-1.22}$|2.50|$^{+0.07}_{-0.05}$||$-$|0.03|$^{+0.24}_{-0.40}$||$-$|0.61|$^{+0.24}_{-0.55}$|28.05|$^{+2.76}_{-2.59}$|79 (19)–
lOBP-Southc82.29|$^{+0.56}_{-0.97}$||$-$|3.08|$^{+0.83}_{-1.27}$|3.01|$^{+0.03}_{-0.06}$|1.10|$^{+0.15}_{-0.09}$||$-$|0.25|$^{+0.07}_{-0.10}$|20.38|$^{+9.25}_{-0.69}$|51 (7)–
mOri Far Westc77.85|$^{+0.83}_{-0.53}$||$-$|4.09|$^{+1.11}_{-1.40}$|2.93|$^{+0.10}_{-0.08}$|0.34|$^{+0.22}_{-0.12}$||$-$|1.29|$^{+0.28}_{-0.28}$|18.80|$^{+2.88}_{-3.31}$|68 (6)–
nOBP-Eastc86.81|$^{+1.28}_{-1.10}$||$-$|1.35|$^{+1.83}_{-1.84}$|2.19|$^{+0.10}_{-0.13}$|2.21|$^{+1.00}_{-1.73}$||$-$|4.11|$^{+0.46}_{-0.54}$|18.62|$^{+0.89}_{-0.69}$|91 (6)–
ClusterName|$\bar{\alpha }$| (deg)|$\bar{\delta }$| (deg)|$\bar{\varpi }$| (mas)|$\bar{\mu }_\alpha ^{*}$| (⁠|$\rm {mas}\ yr^{-1}$|⁠)|$\bar{\mu }_\delta$| (⁠|$\rm {mas}\ yr^{-1}$|⁠)|$\overline{RV}$| (⁠|$\rm {km}\ s^{-1}$|⁠)|$N_T$| (with RV)References
a|$\lambda$| Ori South A85.96|$^{+1.16}_{-1.77}$|6.54|$^{+1.17}_{-1.94}$|2.29|$^{+0.10}_{-0.08}$||$-$|2.99|$^{+0.58}_{-0.48}$||$-$|1.47|$^{+0.54}_{-0.32}$|–136 (1)2, 3
b|$\lambda$| Ori South Ba79.41|$^{+0.43}_{-0.98}$|7.39|$^{+1.60}_{-0.37}$|2.64|$^{+0.14}_{-0.13}$|2.33|$^{+0.28}_{-0.30}$||$-$|3.66|$^{+0.37}_{-0.24}$|–72 (3)2
cL156275.93|$^{+2.89}_{-0.36}$|12.85|$^{+0.38}_{-2.82}$|3.26|$^{+0.21}_{-0.13}$|1.67|$^{+0.34}_{-0.29}$||$-$|3.50|$^{+0.21}_{-0.38}$|–75 (0)2
dL1622a87.52|$^{+0.10}_{-0.09}$|2.82|$^{+0.17}_{-0.33}$|2.53|$^{+0.04}_{-0.10}$||$-$|1.13|$^{+0.28}_{-0.19}$||$-$|1.83|$^{+0.20}_{-0.14}$|–51 (0)1, 2
eOBP-West81.46|$^{+0.48}_{-0.40}$|0.36|$^{+1.03}_{-0.60}$|2.44|$^{+0.05}_{-0.05}$|0.06|$^{+0.30}_{-0.28}$|1.35|$^{+0.23}_{-0.23}$|27.60|$^{+0.70}_{-1.46}$|58 (19)2
fL1616 Ab79.82|$^{+0.67}_{-0.58}$||$-$|1.25|$^{+0.71}_{-0.60}$|2.81|$^{+0.07}_{-0.09}$|1.52|$^{+0.10}_{-0.10}$||$-$|0.46|$^{+0.13}_{-0.18}$|20.92|$^{+1.23}_{-0.83}$|83 (9)2, 3
gL1616 Bb77.21|$^{+0.53}_{-0.39}$||$-$|2.96|$^{+0.46}_{-0.38}$|2.65|$^{+0.05}_{-0.06}$|1.22|$^{+0.19}_{-0.21}$||$-$|0.78|$^{+0.25}_{-0.38}$|22.54|$^{+1.65}_{-0.42}$|67 (7)2, 3
hL163480.82|$^{+0.48}_{-0.40}$||$-$|4.27|$^{+0.54}_{-0.49}$|2.68|$^{+0.08}_{-0.04}$|1.85|$^{+0.21}_{-0.20}$||$-$|1.02|$^{+0.24}_{-0.18}$|–88 (1)2, 3
iRigel79.03|$^{+0.59}_{-0.93}$||$-$|6.57|$^{+1.25}_{-1.58}$|3.46|$^{+0.09}_{-0.18}$|1.72|$^{+0.27}_{-0.34}$||$-$|2.90|$^{+0.28}_{-0.230}$|–67 (0)2, 3
jOrion A East87.26|$^{+1.00}_{-0.59}$||$-$|5.27|$^{+0.62}_{-0.57}$|2.30|$^{+0.09}_{-0.06}$||$-$|2.45|$^{+0.16}_{-0.27}$|0.31|$^{+0.14}_{-0.26}$|–54 (1)2, 3
kOBP-Centrec84.70|$^{+0.67}_{-0.43}$||$-$|0.65|$^{+0.71}_{-1.22}$|2.50|$^{+0.07}_{-0.05}$||$-$|0.03|$^{+0.24}_{-0.40}$||$-$|0.61|$^{+0.24}_{-0.55}$|28.05|$^{+2.76}_{-2.59}$|79 (19)–
lOBP-Southc82.29|$^{+0.56}_{-0.97}$||$-$|3.08|$^{+0.83}_{-1.27}$|3.01|$^{+0.03}_{-0.06}$|1.10|$^{+0.15}_{-0.09}$||$-$|0.25|$^{+0.07}_{-0.10}$|20.38|$^{+9.25}_{-0.69}$|51 (7)–
mOri Far Westc77.85|$^{+0.83}_{-0.53}$||$-$|4.09|$^{+1.11}_{-1.40}$|2.93|$^{+0.10}_{-0.08}$|0.34|$^{+0.22}_{-0.12}$||$-$|1.29|$^{+0.28}_{-0.28}$|18.80|$^{+2.88}_{-3.31}$|68 (6)–
nOBP-Eastc86.81|$^{+1.28}_{-1.10}$||$-$|1.35|$^{+1.83}_{-1.84}$|2.19|$^{+0.10}_{-0.13}$|2.21|$^{+1.00}_{-1.73}$||$-$|4.11|$^{+0.46}_{-0.54}$|18.62|$^{+0.89}_{-0.69}$|91 (6)–

Notes. a Clusters recovered by Chen et al. (2020) only with one clustering algorithm.

b

Clusters recovered by Chen et al. (2020) as one only group.

c

Clusters reported as possible new discoveries.

References: (1) Kounkel et al. (2018), (2) Chen et al. (2020), (3) Swiggum et al. (2021).

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