Plate 25: Giants Near Luminosity Class III: A5–F2

Star Index

Plate 25: Giants Near Luminosity Class III: A5–F2

The principal discriminants for spectral type within the range A5–F2 and for stars near luminosity class in, are: (1)The growth in intensity with advancing spectral type for the Ca II K–line, the Mn I blend at λλ4030–4, and the Ca I resonance line at λ4227; (2) the change in appearance of the line-pattern near λ4300 on passing toward later types.

Valid XHTML Created by diploma on 27/07/04