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Table B.1.

New spectral types (SpT) and projected rotational velocities (v sin i) for our sample of initial B0 stars.

Identifier SpT Literature Source New SpT v sin i [km s−1] Line Resolution
J20325904+4117589 B [1] B2.5 V 205 He I λ6678 5000
J20325976+4114196 B [1] B2: II:p 88 He I λ6678 5000
J20332563+4115247 B [1] B2 IV: nn 425 He I λ6678 5000
J20323949+4052475 B0: V: [2] B0.2 IV 113 He I λ6678 5000
J20323498+4052390 B0.2 IV [2] B0.2 IV 95 He I λ6678 5000
J20331869+4059378 B0.5 IIIe [2] B0.5 IIIe 59 He I λ6678 5000
J20330661+4121131 B0.5 V [3] B0.5 V 186 He I λ6678 5000
J20294666+4105083 B0.5 V + B1 V:-B2 V: [4] B0.5 V (n) 141 He I λ6678 5000
J20305112+4120218 B0 V [2] O9.7 IV 36 He I λ6678 5000
ALS 15161 B0 V [3] - 118 He I 2165
J20334234+4111456 B0 V [3] O9.7: V: 48 He I λ6678 5000
J20331050+4122224 B0 V + (B3 V+B6 V) [4] B0 V 137 He I 2165
J20331859+4124493 B0: [3] B0.2 V 163 He I λ6678 5000
J20321312+4127243 B0 Vp [1] B0: III: (n) 246 He I λ6678 5000
J20321568+4046170 B0.2 IV [2] B0 V 29 He I λ6678 5000
J20330526+4143367 B1 V + B [4] B1 V 134 He I 5000
J20272099+4121261 B0.5 V [5] B0.2: IV: 194 He I λ6678 5000
J20282772+4104018 B0.5 V [2] B0.5 V 160 He I λ6678 5000
J20332099+4135518 B0 III-IV [3] B0 V 15 He I λ6678 5000
J20295701+4109538 B0 V [2] O9.5 IV 67 O III λ5592 13600
J20331106+4110321 B0 V [3] B0.7: V: 78 He I λ6678 5000
J20281547+4038196 B0 V: [2] O9.7 IV 60 He I λ6678 5000
J20315898+4107314 B1 V [5] B1 V 235 He I λ6678 5000
J20331129+4042338 B0: III: [2] O9.7 III 233 He I λ6678 5000
J20331740+4112387 B0: V [3] B0.5 V (n) 355 He I λ6678 5000
J20335925+4105380 B0 V [3] B0 V 141 He I λ6678 5000
J20312210+4112029 B0 III [2] B0.2 V (n) 198 He I λ6678 5000
J20292449+4052597 B0.2 IV [2] B0.2 IV 137 Si III λ4552 7500
J20322774+4128522 B0 Ib [3] B0 Ib 21 He I λ6678 5000
J20305552+4054541 B0 Ib [2] O9.7 III 186 He I 4688
J20314341+4100021 B1 V [5] B1 V (n) 92 He I λ6678 5000
J20314605+4043246 B0.5 IV [2] B0.5 IV 59 Si III λ4552 7500

Notes. The second and third columns present the literature-based spectral classification and reference sources, respectively. The fourth column details the updated SpT obtained in this work. The fifth column gives the projected rotational velocity from iacob-broad. The sixth and seventh columns list the diagnostic line and the spectral resolution of the spectrum used in the computation.

References. [1] Massey & Thompson (1991), [2] Comerón & Pasquali (2012), [3] Kiminki et al. (2007), [4] Maíz Apellániz et al. (2016), [5] Berlanas et al. (2018b).

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