Table : TABLE 11-2 MAIN-SEQUENCE LIFETIMES

Mass (M)

Surface temperature (K)

Luminosity (L)

Time on main sequence (106 years)

Spectral class

25

35,000

80,000

           3

O

15

30,000

10,000

         15

B

  3

11,000

       60

       500

A

  1.5

  7000

         5

     3000

F

  1.0 (Sun)

  6000

         1

  10,000

G

  0.75

  5000

            0.5

  15,000

K

  0.50

  4000

              0.03

200,000

M