Recent content by zaq

no, but thanks for trying. I think I need to clarify what I'm asking. The steps I found for calculating an RC are: get the intensity profile use that to find the mass distribution use mass distribution to find g calculate rotation curve. I have the luminosity profile. (\mu). The units are...

I hope this is in the right forum. I'm trying to see how to calculate rotation curves for a spiral galaxy. The data I have is brightness profile (mag/arcsec^2) and observed rotation curve - to see how it fits. from what I found I need the total mass, and for that I need the surface mass density...