Computers and software • Re: CAMB: minimum value of k for calculating angular...
The low multipoles should converge as long as P(k) doesn't diverge too badly towards zero, but of course default accuracy settings assume nearly scale invariant, so you may need to explore settings....
View ArticleComputers and software • EFTCAMB: Add a Dark Energy Model
Hi,I'm new to this, and I was wondering if someone could guide me on how to add a dark energy model in EFTCAMB. I’ve read the EFTCAMB notes, which mention that it's possible to add your own model, but...
View ArticleComputers and software • CMB polarization formula in CAMB
Hi,Does anyone know how the CMB polarization formula (Delta_{P, l}) is implemented in "equation.f90" file in CAMB?I'd like to reproduce the EB power spectrum assuming cosmic birefringence using CAMB...
View ArticleComputers and software • Re: CMB polarization formula in CAMB
The CAMB notes describe the equations implemented for the polarization hierarchies (see https://camb.readthedocs.io/en/latest/modifying_code.html which has link)Statistics: Posted by Antony Lewis —...
View ArticleComputers and software • CosmoMc:Computer configuration
HiIf I want to run the latest version of CosmoMc, what is the minimum configuration required for my computer?Sorry if this is a basic question, but I’d greatly appreciate any help or advice.Thank you...
View ArticleJob vacancies • 18 Postdoctoral Fellowships at the University of Oslo
The University of Oslo is offering 18 Postdoctoral Fellowships in Computational and Natural Sciences, funded by the MSCA COFUND-project DSTrain. The fellowships are for three years. Application...
View ArticleConferences and meetings • Understanding cosmological observations - Benasque...
Understanding cosmological observationsBenasque centre for sciences, Spain, July 20 to August 2 2025See the web page for details and registration by 1st April (later registrations may also be...
View ArticleComputers and software • CosmoMC: Run stopped after some time
Hello ,I am trying to run cosmomc on a cluster having Ubuntu 20.04 gfortran version 9.4.0. The MPI version is mpiexec (OpenRTE) 4.0.3. I ran with test.ini. The run time for this was OK and chains...
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Computers and software • Discrepancy between CAMB and CLASS for CPL...
Hello everyone,In the context of building the FIM (Fisher Information Matrix) in "w_0 w_a CDM" model, I am trying to find consistent results between the constraints obtained with the Pk from CAMB and...
View ArticleComputers and software • CAMB: are integration backward?
Hi, I was trying to modify CAMB in a way that Friedmann equation behave differently before and after some arbitrary scale factor and I was wondering if the integrations are done from present time to...
View ArticleJob vacancies • Postdoctoral Research Fellowship in Extragalactic...
The Institute of Theoretical Astrophysics of the University of Oslo is offering a three-year Postdoctoral Research Fellowship in Extragalactic Astrophysics. The appointment is part of the EU-funded...
View ArticleComputers and software • Re: CAMB: are integration backward?
Early to presentStatistics: Posted by Antony Lewis — February 03 2025
View ArticleConferences and meetings • Hot topics in Modern Cosmology - SW17
Hot topics in Modern CosmologySpontaneous Workshop XVIIMarch 23rd – 29th, 2025, IESC Cargese, FranceSpontaneous Workshop (SW) brings together specialists in particle physics, astrophysics and...
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Computers and software • Re: Discrepancy between CAMB and CLASS for CPL...
Hello,I have studied the stability of derivatives on C_l to compute FIM elements with above formula.I computed absolute derivatives as respect of Omega_m, w0 and wa (CPL parametrization).You can see...
View ArticleComputers and software • Cobaya error about CamSpec
Hi,I'm trying to run Cobaya with CAMB using the CamSpec data.At first, I installed Cobaya and theory code as:Code: python -m pip install cobaya --upgradecobaya-install cosmo -p...
View ArticleComputers and software • Re: Cobaya error about CamSpec
Not sure, you'd have to track down where the NaN is coming fromStatistics: Posted by Antony Lewis — February 13 2025
View ArticleComputers and software • CosmoMc:Default parameter issues
Why is the default MPI_Limit_Converge = 0.025 and MPI_Limit_Converge_Err = 0.2 in the common.ini file in cosmomc as decimals, but the helper suggests that the above two parameters be taken as a small...
View ArticleComputers and software • Re: Cobaya error using HyRec
Hi,Thanks to the advice here, I successfully ran Cobaya in a normal setting. So next, I want to try to run Cobaya using CAMB and HyRec.I have already confirmed that CAMB runs well with the following...
View ArticleComputers and software • Re: CosmoMc:Default parameter issues
If you mean the AI help assistant, it's just wrong (hallucinating; it tends to either give good answers or nonsense answers, depending on whether the RAG system finds relevant docs or it's something...
View ArticleComputers and software • CosmoMc:Modify the L-CDM model
In the case that the default is the L-CDM model, without modifying its dark energy equation of state, how should I modify the formula of the Hubble parameter H(z) to achieve the purpose of modifying...
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