What Are Thermal Pulses

question 153

Multiple Choice

What are thermal pulses?

• A) They are the loops formed on the H-R diagram as the evolutionary tracks of low-mass stars move beyond the planetary nebula stage.
• B) They are the pulses of radiation emitted during helium shell flashes.
• C) This is another name for the high-luminosity pulses of radiation emitted periodically by variable stars.
• D) They are the burst of radiation given off during a nova.

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