b) How long does it take a 5Mo star to cross the Hertzsprung gap relative to its
ID: 121307 • Letter: B
Question
b) How long does it take a 5Mo star to cross the Hertzsprung gap relative to its main sequence lifetime? Calculate the nuclear and thermal timescales for the star while on the main sequence. Explain how this explains the existence of the "Hertzsprung gap" in color-magnitude diagrams of stars near the Sun. c) How long does the 5Mo star spend on the core helium burning part of its track relative to its main sequence lifetime? (Hint: the core He burning occurs in one of the intervals you looked at in part a.)Explanation / Answer
SOLUTION:-B.
Main sequence star are the star those which lie on the main sequence strip of the H-R diagram. a star continue to be in the main sequence strip until it completelyy fuses the hydrogen present inits core.. The time duration it takes the 5 M star to cross the Hertzsprung gap relative to its main-sequence lifetime is follows:
t = 0.46 million of years (Myr), 0.5%..
The hertzsprung-russell diagram is a diagram that charts out stars and relates information about them such as temperature, color, size, and mass. It is very useful in studying the properties and evolution of stars and summarizes in very neat ways very complex interactions between stars. Often a star's evolution over it's lifetime is plotted as a track along an HR diagram that shows how it's temperature, mass and size change over it's life.
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