Info

The star is a supergiant (luminosity class 0,1, la, lb, see below)

d

Dwarf or main sequence star (luminosity class V, see below)

ë

Giant (luminosity class III, see below)

sd

Subdwarf (luminosity class VI, see below and 'n' above)

w, wd, D

White dwarf (luminosity class VII, see below and 'n' above)

Examples of the use of these symbols

Betelgeuse

M2ev

Sirius B

wA5

Mira

M6ev

K On

cB0.5e

Pollux

gKO

eUMa

AOp

They have very strong ZrO bands in their spectra, and the more usual TiO bands

are weak or absent. The subdivision of these classes has two components. The

Copyright © 1995 IOP Publishing Ltd.

Table 11.4 Luminosity classes.

Designation

Star

I, la, lab, lb

Supergiant (class 0 is sometimes used for truly exceptionally

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