Welcome! This repository houses non-linear and linear matter spectrum emulators of Dark Scattering (DS) model built upon the framework of the halo model reaction. In addition, a baryonic feedback emulator based on HMC0DE2016_FEEDBACK.
Comprehensive documentation of CosmoPower is available here.
Since these emulators were trained by CosmoPower, we recommend using them within a Conda virtual environment.
For example, to create an environment called emu_env, use:
conda create -n emu_env python=3.10 pip
Then, you may easily activate the environment:
conda activate emu_env
Once inside the environment, you can install CosmoPower:
-
from PyPI
pip install cosmopowerTo test the installation, you can use
python3 -c 'import cosmopower as cp'If you do not have a GPU on your machine, you will see a warning message about it which you can safely ignore.
-
from source
git clone https://github.com/alessiospuriomancini/cosmopower cd cosmopower pip install .To test the installation, you can use
pytest
You are now ready to start running the emulators!
To kick off the use of emulators, please ensure that you check the validity range of the input parameters for each emulator.
| Input parameter | Range | Definition |
|---|---|---|
| 'omega_b' | [0.01875, 0.02625] | Physical baryon density parameter |
| 'omega_cdm' | [0.05, 0.255] | Physical dark matter density parameter |
| 'h' | [0.64, 0.82] | Reduced Hubble constant |
| 'n_s' | [0.84, 1.1] | Scalar spectral index |
| 'S_8' | [0.6, 0.9] | Amplitude of matter fluctuations |
| 'm_nu' | [0, 0.2] | Neutrino mass |
| 'w' | [-1.3, -0.7] | Dark energy equation of state |
| 'A' | [-30, 30] | DS interaction term |
| 'c_min' | [2, 4] | Baryonic parameter |
| 'eta_0' | [0.5, 1] | Baryonic parameter |
| 'z' | [0,5] | Redshift |
Please feel free to look at the notebooks directory to find a comprehensive tutorial scripts designed to guide you through the usage of our emulators. Whether you're a beginner or an experienced user, these tutorials cover essential tasks such as emulators setup, manage, and visualization.
We provide visual representations of the accuracy of the emulators. The figures show the accuracy of each emulator:
- DS non-linear matter power spectrum emulator
- DS linear matter power spectrum emulator
- Baryonic feedback emulator
If you use the emulators from this repository in your research, please consider citing the original release paper:
@article{Carrion:2024itc,
author = "Carrion, Karim and Carrilho, Pedro and Spurio Mancini, Alessio and Pourtsidou, Alkistis and Hidalgo, Juan Carlos",
title = "{Dark scattering: accelerated constraints from KiDS-1000 with ReACT and CosmoPower}",
eprint = "2402.18562",
archivePrefix = "arXiv",
primaryClass = "astro-ph.CO",
doi = "10.1093/mnras/stae1663",
journal = "Mon. Not. Roy. Astron. Soc.",
volume = "532",
number = "4",
pages = "3914--3925",
year = "2024"
}
In addition please cite CosmoPower release paper:
@article{SpurioMancini2022,
title={CosmoPower: emulating cosmological power spectra for accelerated Bayesian inference from next-generation surveys},
volume={511},
ISSN={1365-2966},
url={http://dx.doi.org/10.1093/mnras/stac064},
DOI={10.1093/mnras/stac064},
number={2},
journal={Monthly Notices of the Royal Astronomical Society},
publisher={Oxford University Press (OUP)},
author={Spurio Mancini, Alessio and Piras, Davide and Alsing, Justin and Joachimi, Benjamin and Hobson, Michael P},
year={2022},
month={Jan},
pages={1771–1788}
}
CosmoPower is released under the GPL-3 license (see LICENSE) subject to
the non-commercial use condition (see LICENSE_EXT).
CosmoPower
Copyright (C) 2021 A. Spurio Mancini & contributors
This program is released under the GPL-3 license (see LICENSE),
subject to a non-commercial use condition (see LICENSE_EXT).
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.