IB Physics SL E.5.4 Stellar Mass and Evolution

Practise predicting stellar lifetime and end state from initial mass, tracing movement through main sequence, giant or supergiant phases to white dwarf, neutron star or black hole.

Exam points

explain shorter high-mass lifetimes through much greater luminosity and faster fuel consumption
trace a low-mass star from main sequence through red giant and planetary nebula to white dwarf
trace a high-mass star through supergiant and supernova to neutron star or black hole

[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.

Figure for Question E.5.4—Stellar mass and evolution question 1 — IB Physics SL

$M_{\odot}, R_{\odot}$ 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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E.5.4—Stellar mass and evolution question 1