If a 1 M _$\odot$ Protostar Starts Out on the Hayashi Track with a on the Hayashi

question 22

Multiple Choice

If a 1 M _$\odot$ protostar starts out on the Hayashi track with a temperature of 3300 K and a luminosity of 320 L _$\odot$ , what is its approximate radius?

• A) 25 R _\(\odot\)
• B) 55 R _\(\odot\)
• C) 75 R _\(\odot\)
• D) 105 R _\(\odot\)
• E) 125 R _\(\odot\)

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