Table 2.
Sample of the selected eight early-type slow rotators observed with ISIS at the WHT.
| Object | SpT (this work) | SpT (other works) | B (mag) | Coordinates (°) | υ sin i (km s−1) | S/N(b) | S/N(r) | R(b) | R(r) |
|---|---|---|---|---|---|---|---|---|---|
| J20334610+4133010 | O9.7 Iab | O9.7 Iab1 | 11.2 | 308.44 +41.55 | 55 | 180 | 230 | 13600 | 9300 |
| J20295701+4109538 | O9.7 III | B0V2 | 13.0 | 307.49 +41.16 | 70 | 110 | 160 | 13600 | 9300 |
| J20314965+4128265 | O9.7 IV | O9III3 | 12.6 | 307.96 +41.47 | 30 | 180 | 230 | 13600 | 9300 |
| J20272428+4115458 | B0 IV | O9.5V4 | 12.6 | 306.85 +41.26 | 20 | 110 | 220 | 13600 | 9300 |
| J20292449+4052599 | B0.2 IV | B0.2 IV4 | 13.8 | 307.35 +40.88 | 75 | 100 | 130 | 7500 | 9300 |
| J20314605+4043246 | B0.5 IV | B0.5 IV2 | 13.8 | 307.94 +40.72 | 60 | 100 | 150 | 7500 | 9300 |
| BD+40 4210 | B2 Ia | B1III:e4 | 12.2 | 307.77 +40.52 | 30 | 130 | 150 | 13600 | 9300 |
| BD+40 4193 | B2 V | B1V5 | 10.4 | 307.31 +40.68 | 70 | 150 | 250 | 13600 | 9300 |
Notes. Columns give their names, spectral types (from this and other works), B magnitudes, coordinates (J2000.0 epoch) and derived rotational velocities. The spectral signal to noise (per pixel) ratio and resolving power (per element) are also indicated. B magnitudes are taken from Comerón & Pasquali (2012). (b) and (r) refer to the blue and red optical range spectra respectively.
References. Spectral type source: (1) Maíz Apellániz et al. (2016), (2) Hanson (2003), (3) Kiminki et al. (2007), (4) Comerón & Pasquali (2012), and (5) Berlanas et al. (2018).
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