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 47Q
To determine
The radius of Rigel as compared to the radius of the Sun.
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Chapter 17 Solutions
Universe: Stars And Galaxies
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- A G2 star has a luminosity 100 times that of the Sun. What kind of star is it? How does its radius compare with that of the Sun?arrow_forwardThe lowest mass for a true star is 1/12 the mass of the Sun. What is the luminosity of such a star based upon the mass-luminosity relationship?arrow_forwardThe star Betelgeuse has a temperature of 3400 K and a luminosity of 13,200 LSun. Calculate the radius of Betelgeuse relative to the Sun.arrow_forward
- What is the wavelength corressponding to the most intense light emitted by a giant star od surface temperature 5000 k. Answer : 580 nmarrow_forwardf a star has a luminosity of 4*10^26 Watts and a brightness of 1.4*10^3W/m2, how far away is it?arrow_forwardA star with a radius three times that of the Sun and a surface temperature twice that of the Sun, will have a luminosity _______ times as great as the Sun's luminosity. A. 4 B. 9 C. 16 D. 64 E. 144arrow_forward
- The luminosity of Spica is about 5x1030 Joules/second. A mass MH of Hydrogen that undergoes thermonuclear reactions generates E=0.007 MH c2 Joules of energy, where c is the speed of light (in m/s) and MH is in kg. How many kgs of Hydrogen is Spica “burning” per second to produce that luminosity?arrow_forwardA solar type star evolves into a red giant with a luminosity 1000 L⊙ and radius of 1 AU. Determine the surface temperature that the red giant will have. State the wavelength of peak emission for the red giant star and which part of the EM spectrum this corresponds to.arrow_forwardA star has a radius of 2.6 R⊙, and a temperature of 9,758 K. What is the luminosity of this star (answer in solar luminosity units L⊙). [HINT: the temperature of the Sun is about 5800 K]arrow_forward
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