Python unit conversion errors calculating Hubble constant from distance modulus

[Pavkazz]

Homework Statement

I'm using python to calculate the age of the universe, by working out the distmodulus for a set of galaxys (using the V and I bands) then working out the distance in parsecs and then hubbles constant etc... I keep getting values that are 10s of magnitudes out which I assume has something to do with my unit conversion.

Homework Equations

vrec = H0*Dgal.
5 log dpc − 5 + AV = µ + AV

The Attempt at a Solution

Below is my code to work out hubbles constant. My Distance mod is accurate [/B]

 

[mfb]

What is AVG_DPC_V and what does the formula calculating it mean? What is f?
The Hubble constant is a factor 10 too large, that error propagates to the age of the universe.

 

[phyzguy]

By the way, if you enclose your code in "code" tags, we can see your code with the appropriate formatting and even run it if we like. This makes it easier for people to understand code related questions. Below is an example.

import numpy as np
x = 0.5
y = np.sin(x)
print "The sine of %f is %f"%(x,y)

 

[Pavkazz]

What is AVG_DPC_V and what does the formula calculating it mean? What is f?
The Hubble constant is a factor 10 too large, that error propagates to the age of the universe.

Average distance in the V band and the formula calculating is (5 log dpc − 5 + AV = µ + AV) which is dpc = 10^u/5 + 1. I think I may have solved the issue? Is it simply the bracket in the equation above where I am calculating (10^u/5) +1 not 10^(u/5 + 1)?

 

[mfb]

The +1 should be in the exponent, right.