You may have noticed the last column is Luminous mass what

Last updated: 6/6/2023

You may have noticed the last column is Luminous mass what is that Knowing the luminosity inside the galaxy we can calculate how much mass there must be to provide that much light We assume that for every 1 L of light there is about 2 M of mass producing that light Therefore for the radius of 1 kpc the luminous mass would be twice as much luminosity 4 X 108 Complete the last column hint just multiply the luminosity by 2 for each radius this does not change the exponent 1 Consider the furthest point from the center of the galaxy What percentage of the total mass of NGC 2742 is luminous What percentage of the total mass cannot be accounted for in the light observed 2 Based on this is there evidence for the existence of dark matter in NGC 2742 Explain 3 Using the graph provided on the last page plot total mass column 3 vs radius AND luminous mass column 5 vs radius Draw a line going through each set of data points In the end you should have 2 separate lines on the SAME graph