Which of These Is the Likely Progenitor of a Type

question 104

Multiple Choice

Which of these is the likely progenitor of a Type II supernova?

• A)a mass-transfer binary, with the white dwarf already at 1.3 solar masses
• B)a contact binary, with the neutron star at 2.3 solar masses
• C)an evolved red giant which is just starting to make silicon in its core
• D)two white dwarfs in a contact binary system
• E)an evolved blue supergiant that is about to experience the helium flash

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