Program for Supernova Data Fitting

[micomaco86572]

Are there any programs which could be used to fit the Supernova data to constrain the cosmological models's parameter? thx

 

[Chalnoth]

Are there any programs which could be used to fit the Supernova data to constrain the cosmological models's parameter? thx

Well, sort of. Many physicists use COSMOMC for this kind of work. It isn't, however, very user-friendly.

 

[BillSaltLake]

You can drop the {z,M} points into a spread sheet like Excel and take Dm = (10^(M/5))/(1+z) to get {z,Dm} pairs, which are well-behaved (Dm approx az - bz²). You'll need some integrating software to compare the LCDM model which predicts that "a" is proportional to sinh(qt) where q is a constant that depends on the parameters. Then Dm is proportional to the time integral of (1/a)dt. The limits are from the time t_z where a(t_z) = 1/(1+z) to the present time t₀ (which is fixed).

 

[micomaco86572]

Well, sort of. Many physicists use COSMOMC for this kind of work. It isn't, however, very user-friendly.

thank u Chalnoth. I have heard about this program, but I forgot the name.