IB Physics SL E 5 4 Stellar Mass and Evolution Questions

Use SL stellar mass and luminosity evidence to estimate mass, trace HR-diagram evolution and compare the final stages of low- and high-mass stars.

Exam points

use the mass–luminosity relation to estimate stellar mass from luminosity relative to the Sun
trace likely evolutionary paths on an HR diagram and relate movement to changing stellar properties
compare low- and high-mass evolution, including red-giant or red-supergiant stages, planetary nebulae, white dwarfs and supernova outcomes

[Maximum number: 3]

The graph shows an incomplete Hertzsprung-Russell (HR) diagram. The position of the Sun and three other stars, A, B and C , are shown.

$M_{\odot}, R_{\odot}$ and $L_{\odot}$ are the mass, radius and luminosity of the Sun.

Describe the main stages in the evolution of star A after leaving the main sequence.

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