Median observational parameters of the Big Structures recovered in the OSFC with the 16th and 84th percentiles. The cluster number is used for identification in Fig. 4. |$N_T$| corresponds to the total number of stars from the main sample and with radial velocity in parenthesis. The last column shows the references that have studied the clusters using Gaia data.
Cluster . | Name . | |$\bar{\alpha }$| . | |$\bar{\delta }$| . | |$\bar{\varpi }$| . | |$\bar{\mu }_\alpha ^{ *}$| . | |$\bar{\mu }_\delta$| . | |$\overline{RV}$| . | |$N_T$| . | References . |
---|---|---|---|---|---|---|---|---|---|
. | . | (deg) . | (deg) . | (mas) . | (|$\rm {mas}\ yr^{-1}$|) . | (|$\rm {mas}\ yr^{-1}$|) . | (|$\rm {km}\ s^{-1}$|) . | (with RV) . | . |
1 | |$\lambda$| Ori | 83.75|$^{+1.19}_{-1.01}$| | 9.83|$^{+1.26}_{-0.72}$| | 2.55|$^{+0.08}_{-0.07}$| | 1.25|$^{+0.59}_{-0.59}$| | |$-2.12^{+0.40}_{-0.33}$| | 27.26|$^{+2.64}_{-1.63}$| | 773 (250) | 1, 2, 3 |
2 | Ori-Northa | 82.39|$^{+1.21}_{-0.71}$| | 2.09|$^{+1.89}_{-1.05}$| | 2.62|$^{+0.17}_{-0.24}$| | |$-0.67^{+0.33}_{-0.34}$| | 0.73|$^{+0.27}_{-0.29}$| | 30.63|$^{+2.24}_{-1.70}$| | 305 (59) | 2, 3, 4 |
3 | Briceño-1Ab | 82.34|$^{+0.28}_{-0.41}$| | 3.43|$^{+0.36}_{-0.92}$| | 2.94|$^{+0.03}_{-0.04}$| | 1.53|$^{+0.18}_{-0.20}$| | |$-0.59^{+0.17}_{-0.15}$| | 20.35|$^{+2.07}_{-2.67}$| | 175 (36) | 2, 3 |
4 | Briceño-1Bb | 81.13|$^{+0.44}_{-0.34}$| | 1.62|$^{+0.29}_{-0.61}$| | 2.93|$^{+0.06}_{-0.05}$| | 1.38|$^{+0.23}_{-0.17}$| | |$-0.03^{+0.15}_{-0.19}$| | 20.83|$^{+1.22}_{-1.40}$| | 237 (55) | 2, 3 |
5 | Ori-East | 86.54|$^{+0.25}_{-0.50}$| | 0.13|$^{+0.49}_{-0.44}$| | 2.47|$^{+0.05}_{-0.05}$| | |$-0.72^{+0.94}_{-0.58}$| | |$-0.83^{+0.53}_{-0.44}$| | 28.11|$^{+1.93}_{-1.42}$| | 144 (65) | 1, 2 |
6 | OBP-Far | 83.96|$^{+0.56}_{-0.45}$| | |$-1.85^{+0.98}_{-2.89}$| | 2.41|$^{+0.06}_{-0.06}$| | |$-1.40^{+0.51}_{-0.41}$| | 1.03|$^{+0.36}_{-0.47}$| | 30.52|$^{+3.05}_{-1.82}$| | 223 (31) | 2 |
7 | |$\sigma$| Ori | 84.78|$^{+0.31}_{-0.23}$| | |$-2.55^{+0.37}_{-0.19}$| | 2.54|$^{+0.06}_{-0.06}$| | 1.46|$^{+0.64}_{-0.39}$| | |$-0.47^{+0.53}_{-0.43}$| | 30.84|$^{+1.45}_{-1.98}$| | 207 (110) | 1, 2 |
8 | OBP-b | 84.00|$^{+0.45}_{-0.54}$| | |$-0.85^{+0.53}_{-0.90}$| | 2.61|$^{+0.11}_{-0.14}$| | |$-1.02^{+0.35}_{-0.27}$| | |$-0.64^{+0.27}_{-0.20}$| | 31.12|$^{+4.04}_{-5.40}$| | 196 (31) | 2, 3 |
9 | OBP-d | 83.15|$^{+0.32}_{-0.41}$| | |$-1.65^{+0.63}_{-0.40}$| | 2.45|$^{+0.07}_{-0.05}$| | 0.08|$^{+0.39}_{-0.24}$| | |$-0.21^{+0.31}_{-0.26}$| | 30.84|$^{+1.04}_{-1.00}$| | 301 (58) | 2, 3 |
10 | OBP-Near | 83.55|$^{+1.20}_{-1.53}$| | |$-1.77^{+1.07}_{-0.69}$| | 2.83|$^{+0.08}_{-0.07}$| | 1.61|$^{+0.28}_{-0.43}$| | |$-1.24^{+0.24}_{-0.23}$| | 22.77|$^{+2.06}_{-2.57}$| | 534 (133) | 2, 3 |
11 | ONC | 83.82|$^{+0.25}_{-0.30}$| | |$-5.58^{+0.75}_{-0.84}$| | 2.62|$^{+0.08}_{-0.08}$| | 1.16|$^{+0.38}_{-0.44}$| | 0.28|$^{+0.49}_{-0.74}$| | 26.98|$^{+3.53}_{-2.55}$| | 1816 (828) | 1, 2, 3 |
12 | Ori-Southc | 85.62|$^{+0.27}_{-0.33}$| | |$-8.40^{+0.48}_{-1.19}$| | 2.38|$^{+0.07}_{-0.11}$| | 0.33|$^{+0.38}_{-0.37}$| | |$-0.57^{+0.54}_{-0.70}$| | 21.44|$^{+1.80}_{-1.95}$| | 331 (117) | 2, 3 |
13 | Orion Y | 87.84|$^{+0.70}_{-1.44}$| | |$-7.59^{+0.70}_{-1.82}$| | 3.38|$^{+0.14}_{-0.09}$| | 0.14|$^{+0.32}_{-0.32}$| | |$-0.57^{+0.24}_{-0.24}$| | 16.38|$^{+2.42}_{-0.11}$| | 189 (3) | 1, 2, 3N |
Cluster . | Name . | |$\bar{\alpha }$| . | |$\bar{\delta }$| . | |$\bar{\varpi }$| . | |$\bar{\mu }_\alpha ^{ *}$| . | |$\bar{\mu }_\delta$| . | |$\overline{RV}$| . | |$N_T$| . | References . |
---|---|---|---|---|---|---|---|---|---|
. | . | (deg) . | (deg) . | (mas) . | (|$\rm {mas}\ yr^{-1}$|) . | (|$\rm {mas}\ yr^{-1}$|) . | (|$\rm {km}\ s^{-1}$|) . | (with RV) . | . |
1 | |$\lambda$| Ori | 83.75|$^{+1.19}_{-1.01}$| | 9.83|$^{+1.26}_{-0.72}$| | 2.55|$^{+0.08}_{-0.07}$| | 1.25|$^{+0.59}_{-0.59}$| | |$-2.12^{+0.40}_{-0.33}$| | 27.26|$^{+2.64}_{-1.63}$| | 773 (250) | 1, 2, 3 |
2 | Ori-Northa | 82.39|$^{+1.21}_{-0.71}$| | 2.09|$^{+1.89}_{-1.05}$| | 2.62|$^{+0.17}_{-0.24}$| | |$-0.67^{+0.33}_{-0.34}$| | 0.73|$^{+0.27}_{-0.29}$| | 30.63|$^{+2.24}_{-1.70}$| | 305 (59) | 2, 3, 4 |
3 | Briceño-1Ab | 82.34|$^{+0.28}_{-0.41}$| | 3.43|$^{+0.36}_{-0.92}$| | 2.94|$^{+0.03}_{-0.04}$| | 1.53|$^{+0.18}_{-0.20}$| | |$-0.59^{+0.17}_{-0.15}$| | 20.35|$^{+2.07}_{-2.67}$| | 175 (36) | 2, 3 |
4 | Briceño-1Bb | 81.13|$^{+0.44}_{-0.34}$| | 1.62|$^{+0.29}_{-0.61}$| | 2.93|$^{+0.06}_{-0.05}$| | 1.38|$^{+0.23}_{-0.17}$| | |$-0.03^{+0.15}_{-0.19}$| | 20.83|$^{+1.22}_{-1.40}$| | 237 (55) | 2, 3 |
5 | Ori-East | 86.54|$^{+0.25}_{-0.50}$| | 0.13|$^{+0.49}_{-0.44}$| | 2.47|$^{+0.05}_{-0.05}$| | |$-0.72^{+0.94}_{-0.58}$| | |$-0.83^{+0.53}_{-0.44}$| | 28.11|$^{+1.93}_{-1.42}$| | 144 (65) | 1, 2 |
6 | OBP-Far | 83.96|$^{+0.56}_{-0.45}$| | |$-1.85^{+0.98}_{-2.89}$| | 2.41|$^{+0.06}_{-0.06}$| | |$-1.40^{+0.51}_{-0.41}$| | 1.03|$^{+0.36}_{-0.47}$| | 30.52|$^{+3.05}_{-1.82}$| | 223 (31) | 2 |
7 | |$\sigma$| Ori | 84.78|$^{+0.31}_{-0.23}$| | |$-2.55^{+0.37}_{-0.19}$| | 2.54|$^{+0.06}_{-0.06}$| | 1.46|$^{+0.64}_{-0.39}$| | |$-0.47^{+0.53}_{-0.43}$| | 30.84|$^{+1.45}_{-1.98}$| | 207 (110) | 1, 2 |
8 | OBP-b | 84.00|$^{+0.45}_{-0.54}$| | |$-0.85^{+0.53}_{-0.90}$| | 2.61|$^{+0.11}_{-0.14}$| | |$-1.02^{+0.35}_{-0.27}$| | |$-0.64^{+0.27}_{-0.20}$| | 31.12|$^{+4.04}_{-5.40}$| | 196 (31) | 2, 3 |
9 | OBP-d | 83.15|$^{+0.32}_{-0.41}$| | |$-1.65^{+0.63}_{-0.40}$| | 2.45|$^{+0.07}_{-0.05}$| | 0.08|$^{+0.39}_{-0.24}$| | |$-0.21^{+0.31}_{-0.26}$| | 30.84|$^{+1.04}_{-1.00}$| | 301 (58) | 2, 3 |
10 | OBP-Near | 83.55|$^{+1.20}_{-1.53}$| | |$-1.77^{+1.07}_{-0.69}$| | 2.83|$^{+0.08}_{-0.07}$| | 1.61|$^{+0.28}_{-0.43}$| | |$-1.24^{+0.24}_{-0.23}$| | 22.77|$^{+2.06}_{-2.57}$| | 534 (133) | 2, 3 |
11 | ONC | 83.82|$^{+0.25}_{-0.30}$| | |$-5.58^{+0.75}_{-0.84}$| | 2.62|$^{+0.08}_{-0.08}$| | 1.16|$^{+0.38}_{-0.44}$| | 0.28|$^{+0.49}_{-0.74}$| | 26.98|$^{+3.53}_{-2.55}$| | 1816 (828) | 1, 2, 3 |
12 | Ori-Southc | 85.62|$^{+0.27}_{-0.33}$| | |$-8.40^{+0.48}_{-1.19}$| | 2.38|$^{+0.07}_{-0.11}$| | 0.33|$^{+0.38}_{-0.37}$| | |$-0.57^{+0.54}_{-0.70}$| | 21.44|$^{+1.80}_{-1.95}$| | 331 (117) | 2, 3 |
13 | Orion Y | 87.84|$^{+0.70}_{-1.44}$| | |$-7.59^{+0.70}_{-1.82}$| | 3.38|$^{+0.14}_{-0.09}$| | 0.14|$^{+0.32}_{-0.32}$| | |$-0.57^{+0.24}_{-0.24}$| | 16.38|$^{+2.42}_{-0.11}$| | 189 (3) | 1, 2, 3N |
Notes. aOri-North is composed by two sub-structures ω-Ori and ASCC 20 as seen in Section 5.2.
Briceño-1A and Briceño-1B were identified as a unique structure by Chen et al. (2020) under the name Briceño-1.
Ori-South is composed by two sub-structures: L1641S and L1647 as seen in Section 5.2.
References: (1) Kounkel et al. (2018), (2) Chen et al. (2020), (3) Swiggum et al. (2021), (4) Kos et al. (2019).
Median observational parameters of the Big Structures recovered in the OSFC with the 16th and 84th percentiles. The cluster number is used for identification in Fig. 4. |$N_T$| corresponds to the total number of stars from the main sample and with radial velocity in parenthesis. The last column shows the references that have studied the clusters using Gaia data.
Cluster . | Name . | |$\bar{\alpha }$| . | |$\bar{\delta }$| . | |$\bar{\varpi }$| . | |$\bar{\mu }_\alpha ^{ *}$| . | |$\bar{\mu }_\delta$| . | |$\overline{RV}$| . | |$N_T$| . | References . |
---|---|---|---|---|---|---|---|---|---|
. | . | (deg) . | (deg) . | (mas) . | (|$\rm {mas}\ yr^{-1}$|) . | (|$\rm {mas}\ yr^{-1}$|) . | (|$\rm {km}\ s^{-1}$|) . | (with RV) . | . |
1 | |$\lambda$| Ori | 83.75|$^{+1.19}_{-1.01}$| | 9.83|$^{+1.26}_{-0.72}$| | 2.55|$^{+0.08}_{-0.07}$| | 1.25|$^{+0.59}_{-0.59}$| | |$-2.12^{+0.40}_{-0.33}$| | 27.26|$^{+2.64}_{-1.63}$| | 773 (250) | 1, 2, 3 |
2 | Ori-Northa | 82.39|$^{+1.21}_{-0.71}$| | 2.09|$^{+1.89}_{-1.05}$| | 2.62|$^{+0.17}_{-0.24}$| | |$-0.67^{+0.33}_{-0.34}$| | 0.73|$^{+0.27}_{-0.29}$| | 30.63|$^{+2.24}_{-1.70}$| | 305 (59) | 2, 3, 4 |
3 | Briceño-1Ab | 82.34|$^{+0.28}_{-0.41}$| | 3.43|$^{+0.36}_{-0.92}$| | 2.94|$^{+0.03}_{-0.04}$| | 1.53|$^{+0.18}_{-0.20}$| | |$-0.59^{+0.17}_{-0.15}$| | 20.35|$^{+2.07}_{-2.67}$| | 175 (36) | 2, 3 |
4 | Briceño-1Bb | 81.13|$^{+0.44}_{-0.34}$| | 1.62|$^{+0.29}_{-0.61}$| | 2.93|$^{+0.06}_{-0.05}$| | 1.38|$^{+0.23}_{-0.17}$| | |$-0.03^{+0.15}_{-0.19}$| | 20.83|$^{+1.22}_{-1.40}$| | 237 (55) | 2, 3 |
5 | Ori-East | 86.54|$^{+0.25}_{-0.50}$| | 0.13|$^{+0.49}_{-0.44}$| | 2.47|$^{+0.05}_{-0.05}$| | |$-0.72^{+0.94}_{-0.58}$| | |$-0.83^{+0.53}_{-0.44}$| | 28.11|$^{+1.93}_{-1.42}$| | 144 (65) | 1, 2 |
6 | OBP-Far | 83.96|$^{+0.56}_{-0.45}$| | |$-1.85^{+0.98}_{-2.89}$| | 2.41|$^{+0.06}_{-0.06}$| | |$-1.40^{+0.51}_{-0.41}$| | 1.03|$^{+0.36}_{-0.47}$| | 30.52|$^{+3.05}_{-1.82}$| | 223 (31) | 2 |
7 | |$\sigma$| Ori | 84.78|$^{+0.31}_{-0.23}$| | |$-2.55^{+0.37}_{-0.19}$| | 2.54|$^{+0.06}_{-0.06}$| | 1.46|$^{+0.64}_{-0.39}$| | |$-0.47^{+0.53}_{-0.43}$| | 30.84|$^{+1.45}_{-1.98}$| | 207 (110) | 1, 2 |
8 | OBP-b | 84.00|$^{+0.45}_{-0.54}$| | |$-0.85^{+0.53}_{-0.90}$| | 2.61|$^{+0.11}_{-0.14}$| | |$-1.02^{+0.35}_{-0.27}$| | |$-0.64^{+0.27}_{-0.20}$| | 31.12|$^{+4.04}_{-5.40}$| | 196 (31) | 2, 3 |
9 | OBP-d | 83.15|$^{+0.32}_{-0.41}$| | |$-1.65^{+0.63}_{-0.40}$| | 2.45|$^{+0.07}_{-0.05}$| | 0.08|$^{+0.39}_{-0.24}$| | |$-0.21^{+0.31}_{-0.26}$| | 30.84|$^{+1.04}_{-1.00}$| | 301 (58) | 2, 3 |
10 | OBP-Near | 83.55|$^{+1.20}_{-1.53}$| | |$-1.77^{+1.07}_{-0.69}$| | 2.83|$^{+0.08}_{-0.07}$| | 1.61|$^{+0.28}_{-0.43}$| | |$-1.24^{+0.24}_{-0.23}$| | 22.77|$^{+2.06}_{-2.57}$| | 534 (133) | 2, 3 |
11 | ONC | 83.82|$^{+0.25}_{-0.30}$| | |$-5.58^{+0.75}_{-0.84}$| | 2.62|$^{+0.08}_{-0.08}$| | 1.16|$^{+0.38}_{-0.44}$| | 0.28|$^{+0.49}_{-0.74}$| | 26.98|$^{+3.53}_{-2.55}$| | 1816 (828) | 1, 2, 3 |
12 | Ori-Southc | 85.62|$^{+0.27}_{-0.33}$| | |$-8.40^{+0.48}_{-1.19}$| | 2.38|$^{+0.07}_{-0.11}$| | 0.33|$^{+0.38}_{-0.37}$| | |$-0.57^{+0.54}_{-0.70}$| | 21.44|$^{+1.80}_{-1.95}$| | 331 (117) | 2, 3 |
13 | Orion Y | 87.84|$^{+0.70}_{-1.44}$| | |$-7.59^{+0.70}_{-1.82}$| | 3.38|$^{+0.14}_{-0.09}$| | 0.14|$^{+0.32}_{-0.32}$| | |$-0.57^{+0.24}_{-0.24}$| | 16.38|$^{+2.42}_{-0.11}$| | 189 (3) | 1, 2, 3N |
Cluster . | Name . | |$\bar{\alpha }$| . | |$\bar{\delta }$| . | |$\bar{\varpi }$| . | |$\bar{\mu }_\alpha ^{ *}$| . | |$\bar{\mu }_\delta$| . | |$\overline{RV}$| . | |$N_T$| . | References . |
---|---|---|---|---|---|---|---|---|---|
. | . | (deg) . | (deg) . | (mas) . | (|$\rm {mas}\ yr^{-1}$|) . | (|$\rm {mas}\ yr^{-1}$|) . | (|$\rm {km}\ s^{-1}$|) . | (with RV) . | . |
1 | |$\lambda$| Ori | 83.75|$^{+1.19}_{-1.01}$| | 9.83|$^{+1.26}_{-0.72}$| | 2.55|$^{+0.08}_{-0.07}$| | 1.25|$^{+0.59}_{-0.59}$| | |$-2.12^{+0.40}_{-0.33}$| | 27.26|$^{+2.64}_{-1.63}$| | 773 (250) | 1, 2, 3 |
2 | Ori-Northa | 82.39|$^{+1.21}_{-0.71}$| | 2.09|$^{+1.89}_{-1.05}$| | 2.62|$^{+0.17}_{-0.24}$| | |$-0.67^{+0.33}_{-0.34}$| | 0.73|$^{+0.27}_{-0.29}$| | 30.63|$^{+2.24}_{-1.70}$| | 305 (59) | 2, 3, 4 |
3 | Briceño-1Ab | 82.34|$^{+0.28}_{-0.41}$| | 3.43|$^{+0.36}_{-0.92}$| | 2.94|$^{+0.03}_{-0.04}$| | 1.53|$^{+0.18}_{-0.20}$| | |$-0.59^{+0.17}_{-0.15}$| | 20.35|$^{+2.07}_{-2.67}$| | 175 (36) | 2, 3 |
4 | Briceño-1Bb | 81.13|$^{+0.44}_{-0.34}$| | 1.62|$^{+0.29}_{-0.61}$| | 2.93|$^{+0.06}_{-0.05}$| | 1.38|$^{+0.23}_{-0.17}$| | |$-0.03^{+0.15}_{-0.19}$| | 20.83|$^{+1.22}_{-1.40}$| | 237 (55) | 2, 3 |
5 | Ori-East | 86.54|$^{+0.25}_{-0.50}$| | 0.13|$^{+0.49}_{-0.44}$| | 2.47|$^{+0.05}_{-0.05}$| | |$-0.72^{+0.94}_{-0.58}$| | |$-0.83^{+0.53}_{-0.44}$| | 28.11|$^{+1.93}_{-1.42}$| | 144 (65) | 1, 2 |
6 | OBP-Far | 83.96|$^{+0.56}_{-0.45}$| | |$-1.85^{+0.98}_{-2.89}$| | 2.41|$^{+0.06}_{-0.06}$| | |$-1.40^{+0.51}_{-0.41}$| | 1.03|$^{+0.36}_{-0.47}$| | 30.52|$^{+3.05}_{-1.82}$| | 223 (31) | 2 |
7 | |$\sigma$| Ori | 84.78|$^{+0.31}_{-0.23}$| | |$-2.55^{+0.37}_{-0.19}$| | 2.54|$^{+0.06}_{-0.06}$| | 1.46|$^{+0.64}_{-0.39}$| | |$-0.47^{+0.53}_{-0.43}$| | 30.84|$^{+1.45}_{-1.98}$| | 207 (110) | 1, 2 |
8 | OBP-b | 84.00|$^{+0.45}_{-0.54}$| | |$-0.85^{+0.53}_{-0.90}$| | 2.61|$^{+0.11}_{-0.14}$| | |$-1.02^{+0.35}_{-0.27}$| | |$-0.64^{+0.27}_{-0.20}$| | 31.12|$^{+4.04}_{-5.40}$| | 196 (31) | 2, 3 |
9 | OBP-d | 83.15|$^{+0.32}_{-0.41}$| | |$-1.65^{+0.63}_{-0.40}$| | 2.45|$^{+0.07}_{-0.05}$| | 0.08|$^{+0.39}_{-0.24}$| | |$-0.21^{+0.31}_{-0.26}$| | 30.84|$^{+1.04}_{-1.00}$| | 301 (58) | 2, 3 |
10 | OBP-Near | 83.55|$^{+1.20}_{-1.53}$| | |$-1.77^{+1.07}_{-0.69}$| | 2.83|$^{+0.08}_{-0.07}$| | 1.61|$^{+0.28}_{-0.43}$| | |$-1.24^{+0.24}_{-0.23}$| | 22.77|$^{+2.06}_{-2.57}$| | 534 (133) | 2, 3 |
11 | ONC | 83.82|$^{+0.25}_{-0.30}$| | |$-5.58^{+0.75}_{-0.84}$| | 2.62|$^{+0.08}_{-0.08}$| | 1.16|$^{+0.38}_{-0.44}$| | 0.28|$^{+0.49}_{-0.74}$| | 26.98|$^{+3.53}_{-2.55}$| | 1816 (828) | 1, 2, 3 |
12 | Ori-Southc | 85.62|$^{+0.27}_{-0.33}$| | |$-8.40^{+0.48}_{-1.19}$| | 2.38|$^{+0.07}_{-0.11}$| | 0.33|$^{+0.38}_{-0.37}$| | |$-0.57^{+0.54}_{-0.70}$| | 21.44|$^{+1.80}_{-1.95}$| | 331 (117) | 2, 3 |
13 | Orion Y | 87.84|$^{+0.70}_{-1.44}$| | |$-7.59^{+0.70}_{-1.82}$| | 3.38|$^{+0.14}_{-0.09}$| | 0.14|$^{+0.32}_{-0.32}$| | |$-0.57^{+0.24}_{-0.24}$| | 16.38|$^{+2.42}_{-0.11}$| | 189 (3) | 1, 2, 3N |
Notes. aOri-North is composed by two sub-structures ω-Ori and ASCC 20 as seen in Section 5.2.
Briceño-1A and Briceño-1B were identified as a unique structure by Chen et al. (2020) under the name Briceño-1.
Ori-South is composed by two sub-structures: L1641S and L1647 as seen in Section 5.2.
References: (1) Kounkel et al. (2018), (2) Chen et al. (2020), (3) Swiggum et al. (2021), (4) Kos et al. (2019).
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