Using the H-R diagram (Figure 13-17), determine the effective temperature and the luminosity of a star whose mass is (a) 0.3 M and (b)

Using the H-R diagram (Figure 13-17), determine the effective temperature and the luminosity of a star whose mass is

(a) 0.3 M_Θ and 

(b) 3 M_Θ. 

(c) Compute the radius of each star. 

(d) Determine their expected lifetimes relative to that of the Sun.

Figure 13-17

Luminosity, L/L 106 104 10 1 10-- 10-4 O 40,000 Luminosity, L/L 102. 10- B White dwarfs 20,000 3 2 + A 6300 Main sequence F G Red supergiants 5000 Temperature, K (b) Sun 10,000 Temperature, K Red giants 5000 K 6 4000 M 2500