 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| • |
H-R diagram will appear over and over again in class
|
|
|
| • |
Deviations from patterns help understanding evolution of stars
|
|
|
| • |
Equivalent kinds of plots:
|
|
|
|
• |
Luminosity vs. Temperature (what we’ve been showing)
|
|
|
|
• |
Absolute Magnitude
vs. Spectral Type (the
“original” H-R
|
|
|
diagram)
|
|
|
|
• |
Apparent Magnitude vs. Spectral Type
|
|
|
|
• |
Patterns still the same if all stars are at same difference
|
|
|
|
• |
All stars will be shifted vertically by the same amount:
|
|
|
|
m-M= -5 + 5 log(d)
|
|
|
|
• |
Magnitude vs. Color (called
“color-magnitude diagrams”)
|
