Answered: Why do bigger stars burn out…

Stars and Galaxies (MindTap Course List)

10th Edition

ISBN:9781337399944

Author:Michael A. Seeds

Publisher:Michael A. Seeds

Chapter14: Neutron Stars And Black Holes

Section: Chapter Questions

Problem 6RQ

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Similar questions

Which is likely to be more common in our Galaxy: white dwarfs or black holes? Why?
Do the same calculations as in Exercise 23.42 but for a pulsar that rotates 1000 times per second.
Why can we not determine distances to galaxies by the same method used to measure the parallaxes of stars?
Find the approximate mass of the luminous matter in the Milky Way galaxy, given it has approximately 1011 stars at average mass 1.5 times than of our Sun.
A stellar black hole may form when a massive star dies. The mass of the star collapses down to a single point. Imagine an astronaut orbiting a black hole having eight times the mass of the Sun. Assume the orbit is circular. a. Find the speed of the astronaut if his orbital radius is r = 1 AU. b. Find his speed if his orbital radius is r = 11.8 km. c. CHECK and THINK: Compare your answers to the speed of light in a vacuum. What would the astronauts orbital speed be if his orbital radius were smaller than 11.8 km?
What is the average density of the neutron star in Exercise 23.38? How does it compare to the average density of Earth?
Say that a particular white dwarf has the mass of the Sun but the radius of Earth. What is the acceleration of gravity at the surface of the white dwarf? How much greater is this than g at the surface of Earth? What would you weigh at the surface of the white dwarf (again granting us the dubious notion that you could survive there)?
A star is observed to move away from us at a speed of 2.8km/s. How far is the star ? Express your answer in light years. I first tried 2.8 km/s divided by the Hobble constant of 21.4 km/s/MLY and got 0.13, but it's wrong.
Give the equation to calculate proper lenght L0.
The hypervelocity star S5HVS1 has a redshifted Hβ line (rest wavelength of486.135 nm) observed at 487.784 nm. How fast is it traveling radially awayfrom the Earth?
Suppose we represent an ordinary star as a uniform solid rigid sphere. The star’s initial radius is 644000 km (comparableto the size of our sun). After it collapses, forming a neutron star, its final radius is only 18.3 km! If the original starmakes one complete rotation about its axis once per month (every 30 days), find the neutron star’s period of rotationjust after the original star has collapsed.Tafter = (in s)
A star with mass m, period Ti = 30 days, and radius ri = 1E4 km collapses into a neutron star (Links to an external site.) with a radius of rf = 3 km. Our goal will be to determine the period Tf of the neutron star. Useful formulae: Li=Lf; L=Iω; ω=2πf=2π/T; Isphere=2/5mr^2.

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Why do bigger stars burn out quicker(have a shorter lifespan