EBK THE COSMIC PERSPECTIVE
EBK THE COSMIC PERSPECTIVE
9th Edition
ISBN: 9780135161760
Author: Voit
Publisher: VST
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Chapter 23, Problem 56EAP

Weighing a Cluster. A cluster of galaxies has a radius of about 5.1 million light-years  4.8 × 10 22 m and an intracluster medium with a temperature of  6 × 10 7 k . Estimate the mass of the cluster. Give your answer in both kilograms and solar masses. Suppose that the combined luminosity of all the stars in the cluster is  8 × 10 12 L S u n . What is the cluster’s mass-to-light ratio?

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EBK THE COSMIC PERSPECTIVE

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