Plate 9: P Cygni

Star Index

Plate 9: P Cygni

The stellar radial velocity is approximately that of the emission lines. The absorption features lie in a dense, expanding shell. The plates illustrated have a scale of 39 A/mm.

A classical paper on the spectrum of P Cygni is: Struve, (Ap.J., 81, 66, 1935).

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