Observations show that stellar luminosity, L, and mass, M, are related by Lx M3.5 for main sequence stars. Obtain an expression that relates the main sequence life time and the mass of a star. You should assume that the luminosity is constant throughout a star's main sequence life time, and that the amount of mass converted into energy by a star while it is on the main sequence is given by AM main sequence life time of a 20 Solar mass star given that the Sun is expected to spend fM, where f is a constant. Estimate the 1010 years on the main sequence. Comment on the significance of your answer.
Observations show that stellar luminosity, L, and mass, M, are related by Lx M3.5 for main sequence stars. Obtain an expression that relates the main sequence life time and the mass of a star. You should assume that the luminosity is constant throughout a star's main sequence life time, and that the amount of mass converted into energy by a star while it is on the main sequence is given by AM main sequence life time of a 20 Solar mass star given that the Sun is expected to spend fM, where f is a constant. Estimate the 1010 years on the main sequence. Comment on the significance of your answer.
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Transcribed Image Text:Observations show that stellar luminosity, L, and mass, M, are related by L x M3.5 for
main sequence stars. Obtain an expression that relates the main sequence life time and
the mass of a star. You should assume that the luminosity is constant throughout a star's
main sequence life time, and that the amount of mass converted into energy by a star while
it is on the main sequence is given by AM
main sequence life time of a 20 Solar mass star given that the Sun is expected to spend
1010 years on the main sequence. Comment on the significance of your answer.
fM, where f is a constant. Estimate the
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