13. A0
The lines of He I are faint or absent in the dwarfs. The strongest enhanced lines of iron are faintly present in main-sequence stars and increase in strength with increasing luminosity. The hydrogen lines show a marked negative absolute-magnitude effect.
Star | MKK | a | ![]() | m | HD | Note |
C Hya.... | A0 V | 08:20 | -03°35' | 4.0 | A0 | |
![]() | A0 V | 11:48 | +54 15 | 2.5 | A0 | |
a CrB.... | A0 V | 15:30 | +27 03 | 2.3 | A0 | |
a Lyr...... | A0 V | 18:33 | +38 41 | 0.1 | A0 | |
![]() | A0 III | 19:41 | +44 53 | 3.0 | A0 | 1 |
NOTE | ||||||
1. The hydrogen lines in ![]() |
The luminosity classification was made on the basis of the wings of the hydrogen lines.
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High resolution image |