- #1
frankinstein
- 74
- 0
I've read a little about how rotation curves for galaxies are calulated and my question is since rotation curves of galaxies are calculated using the center mass of a galaxy from a star's orbit would the effect of stellar mass extending beyond the star's orbit that is directly behind the galaxtic center have a significant influence on a star's expected orbital velocity?
In other words the amount of mass outside a star's orbit is significant, so for any calculation for a star's orbital velocity some 70% to 90%, depending on how far out a star is from the galatic center, of the galaxiy's total mass is needed to make the calculation. Attached is a pic of what I'm thinking about.
Frank
In other words the amount of mass outside a star's orbit is significant, so for any calculation for a star's orbital velocity some 70% to 90%, depending on how far out a star is from the galatic center, of the galaxiy's total mass is needed to make the calculation. Attached is a pic of what I'm thinking about.
Frank
Attachments
Last edited: