Joined: 17 May 2017
Affiliation: The University of Auckland
|Posted: September 11 2017
|I'm actually running it with ModeCode, but the error is still from CosmoMC. I set param[w] = 0.33333 (radiation dominated; i.e. just after inflation).
However, I get the error as written in the title. This is probably a basic question - I looked at http://cosmocoffee.info/viewtopic.php?t=2593 which brought up the idea of finding the starting value of theta that commensurates with w -
how can I derive an 'intelligent' start value for theta?
In the radiation-dominated universe, I can write
; I'm not sure where to integrate to though. Additionally, I'm wondering where the equation of state parameter w comes in. Knowing DA, I was wondering if there was something I need to consider for getting the sound horizon distance rs. From there, I want to get θ. Thanks in advance.
For now, I have (conservatively)
|H0_min = 1
H0_max = 150
param[theta] = 1.0411 1.00 1.08 0.0004 0.0004
param[w] = 0.33333 (but plan to put a prior on it).