A Star in the Instability Strip Pulsates Because

question 1

Multiple Choice

A star in the instability strip pulsates because

• A) the energy produced by the core is not constant.
• B) the energy produced by the hydrogen burning shell is not constant.
• C) the core of the star is composed of helium and degenerate electrons.
• D) the surface temperature of the star is increasing.
• E) density and opacity of the helium ionization zone changes with time.

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Definitions:

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