|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
• |
Main sequence not quite
|
|
|
constant R
|
|
|
|
• |
B stars: R ~10
RSun
|
|
|
|
|
|
• |
M stars: R
~0.1 RSun
|
|
|
|
|
• |
Betelgeuse:
R~ 1,000 RSun
|
|
|
|
|
|
• |
Larger than 1 AU
|
|
|
• |
White dwarfs:
R~ 0.01 RSun
|
|
|
|
|
|
• |
A few Earth radii
|
|
|
• |
What
causes the “main
|
|
|
sequence”?
|
|
|
|
• |
Why
“similar” size, with
|
|
|
precise
R related to T?
|
|
|
|
• |
Why
range of T?
|
|
|
• |
Why
are a few stars (giants, white
|
|
dwarfs)
not on main sequence?
|
|
|
|