When a 3 M=_$\odot$=protostar forms, it starts out at the top of the Hayashi track with a luminosity of 4,000 L=_$\odot$= and a temperature of 3600 K. What is its radius at this point (give the answer in units of R=_$\odot$=), and how many times larger is it at this stage compared to its radius as a main-sequence star, which is about 2.5 R=_$\odot$=? For reference, the Sun's temperature is 5800 K.

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The Answer of When a 3 M=_$\odot$=protostar forms, it starts out at the top of the Hayashi track with a luminosity of 4,000 L=_$\odot$= and a temperature of 3600 K. What is its radius at this point (give the answer in units of R=_$\odot$=), and how many times larger is it at this stage compared to its radius as a main-sequence star, which is about 2.5 R=_$\odot$=? For reference, the Sun's temperature is 5800 K.

When a 3 M= ⊙\odot⊙ =protostar Forms, It Starts Out at the Top of the at the Top

When a 3 M=_$\odot$=protostar Forms, It Starts Out at the Top of the at the Top