Stars (continuted)
The sets of 5 stellar images in the right upper corners (or lower corner) should
look familiar. The vertical lines in these plots are to help the viewer
recognize the stellar absorption lines. You may notice that the hottest stars
are not necessarily the brightest. The left axis is the flux, and not the
luminosity. The flux depends on both the luminosity (how much energy the star is
putting out) and the distance.
| Spectral class |
|
| O |
 |
| OB |
 |
| B6 |
 |
| B9 |
 |
| F2 |
 |
| F5 |
 |
| F9 |
 |
| G2 |
 |
G5
(like
the sun) |
 |
| K3 |
 |
| K7 |
 |
| M5 |
 |