S stars

Alternative definitions (5), class: vernacular (0)
Term: S stars

A red giant of spectral type S whose spectrum is dominated by molecular bands arising from zirconium oxide (ZrO). S stars also have strong cyanogen bands and contain spectral lines of lithium and technetium. Almost all S stars are long-period variables.

Created 2023.04.16
Last Modified 2023.04.16
Contributed by Ryan McGranaghan