- #1
Sofia Piol
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- TL;DR Summary
- rotation curve of a gas disk in an elliptical galaxy
Hello, I'm Sofia and new here! I'm working on a project in which I'm trying to show that dark matter exists. It's about an elliptical galaxy with a rotating gas disk. What I'm doing is comparing the theoretical calculation of the rotation curve with the actual measured rotation curve. It should be that the gas disc is actually rotating faster than predicted and therefore there is more mass there than you can see. I have already found a formula for the rotation curve, but I'm not sure if it makes sense. I used the Jaffe profile for the mass distribution. I also don't know how it is possible to plot this predicted rotation curve without knowing the total mass and the scale radius "a". I would be very happy if someone could help me with this!