Universe: Stars And Galaxies
6th Edition
ISBN: 9781319115098
Author: Roger Freedman, Robert Geller, William J. Kaufmann
Publisher: W. H. Freeman
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Chapter 17, Problem 57Q
To determine
The aspect of the spectrum of a G2 star that one needs to concentrate on to find the luminosity class of the star given that some giant and supergiant stars are of the same spectral type.
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. The spectrum of Star A peaks at 700 nm. The spectrum of Star B peaks at 470 nm. We know
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A. Star A has a higher luminosity than Star B.
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C. Star A is cooler than Star B.
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F. C and D
The Hertzsprung-Russell diagram contains a region called the main sequence. Stars on this sequence have specific characteristics not found in other stars. What are these characteristics?
a.Stars on the Hertzsprung-Russell diagram main sequence have roughly the same age.
b.Stars on the main sequence of the Hertzsprung-Russell diagram are all roughly the same radius.
c.Stars on the main sequence of the Hertzsprung-Russell diagram have an orderly arrangement of stellar masses, decreasing in mass from lower right to upper left.
d.Stars on the main sequence of a Hertzsprung-Russell diagram do not produce heavy elements like iron.
e.Stars on the main sequence of a Hertzsprung-Russell diagram all generate energy from nuclear fusion.
f.None of the mentioned choices.
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Chapter 17 Solutions
Universe: Stars And Galaxies
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