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

[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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