Plate 2: The O5–O6 Supergiants and Two He I 3888 Wolf–Rayet Stars

Star Index

Plate 2: The O5–O6 Supergiants and Two He I 3888 Wolf–Rayet Stars

The types given for the WN stars are from Hiltner and Schild (Ap.J., 143, 770, 1966). The P Cygni components for the N IV 3483 blend, He I 3888 and He I 4471 are marked — together with the normal positions for each line. The shifts for He I 3888 are around -1600 km/sec (HD191765) and -1400 km/sec (HD 192163), according to Bappu (I.A.U. Symp., No.49, 74, 1973).

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