[CAMB] High-ell accuracy for changes to recombination

Use of Cobaya. camb, CLASS, cosmomc, compilers, etc.
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Luke Hart
Posts: 67
Joined: July 13 2015
Affiliation: University of Manchester

[CAMB] High-ell accuracy for changes to recombination

Post by Luke Hart » April 23 2021

Hi all,

I'm trying to run CAMB with some changes to recombination that propagate to the C_ells and I've noticed that the residuals are quite wacky when you make the ell range high up (ell~8000) and I wanted to know if there was a go-to accuracy parameter that could potentially fix this? I've seen other posts about CAMB accuracy at high ells but wasn't really sure if there was a definitive answer. These are changes coming from the thermo code (i.e. recfast, hyrec, CosmoRec)

Thanks
Luke

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