Finding the present day distance to a galaxy

[tovisonnenberg]

TL;DR

Do distance calculations on supernovae only reveal the distance to the host galaxy at the time of the supernova?

Hi everyone! Does using the distance modulus—m-M=5log(r/10)—on type 1a supernovae only provide the distance to the host galaxy at the time of the supernova? If so, how would I mathematically determine the present day distance to a galaxy by taking into account both the expansion of the universe and the acceleration of that expansion?

 

[PAllen]

Maybe this and the author's earlier insights will help you:

https://www.physicsforums.com/insights/dark-energy-part-3-fitting-the-scp-union-2-1-supernova-data/