Plate 23: Two Diffuse K–Line A–Stars

Star Index

Plate 23: Two Diffuse K–Line A–Stars

It does not seem possible to account for the shallow, diffuse K–line (kn) in the stars illustrated, in terms of composite spectra from two unresolved stars. Some of the peculiar strontium A–type stars are variable — both in light and in spectrum.

The spectral types were determined principally from the relative intensity of the K line to nearby H lines. The luminosity classes were determined from the wings of the H lines.

Valid XHTML Created by diploma on 27/07/04