cosmology
25 posts
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PySM 3.4.6 released: FLAMINGO kSZ models and c1 documentation
A practical introduction to the new FLAMINGO kinetic SZ presets and documented c1 cosmology in PySM 3.4.6.
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SPT-3G D1 high-ℓ CMB power spectra vs. Planck 2018
Load and compare the SPT-3G D1 high-ell TT power spectra with the Planck 2018 CMB power spectrum, illustrating primary vs. secondary CMB anisotropies.
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Cosmosage: A specialized AI assistant for cosmology
Cosmosage is an AI assistant specialized in cosmology. It has been trained on thousands of cosmology papers and textbooks, starting from a large-language model base and subsequently fine-tuned on cosmology-specific data and synthetic Q&A pairs.
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Generate sample Cosmology data for Cheap and FAIR data portal with PySM
This notebook generates some figures of Galactic and Extra-Galactic emissions using PySM. Mostly for displaying purposes.
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2024-07-29-pysm-point-source-pixell-healpix
Testing the pixell simobjects functionality to create maps of point sources pre-smoothed with a gaussian beam. The purpose is to include this functionality in PySM to be able to generate on the fly maps of source starting from a catalog.
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2024-05-20-HEALPix-in-Megapixels
How many megapixels is a HEALPix map? python !pip install healpy
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News item on SDSC website about Advanced Simons Observatory and PySM
In collaboration with the SDSC Communications team I prepared a news item for the SDSC Website announcing my participation in the Advanced Simons Observatory project focusing on my work on supporting PySM.
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2024-05-02-pysm-point-source-pixell
Testing the pixell simobjects functionality to create maps of point sources pre-smoothed with a gaussian beam. The purpose is to include this functionality in PySM to be able to generate on the fly maps of source starting from a catalog.
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Generate figures for PySM emissions
This notebook generates some figures of Galactic and Extra-Galactic emissions using PySM. Mostly for displaying purposes.
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Cosmology webinar Hyper Suprime-Cam
Webinar about Cosmology results, in particular tension in $S8$ by the Hyper Supreme Cam collaboration: Video on Youtube
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Compare HEALPix and Gauss-Legendre pixelizations for sky emission modelling
import healpy as hp import numpy as np import matplotlib.pyplot as plt from time import time from astropy import units as u
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New paper about PySM 3
Update November 2021 Paper was published on JOSS:
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Investigate rotation of masks in healpy
Investigating a question about healpy on Stackoverflow python import healpy as hp import numpy as np %matplotlib inline
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Correct a power spectrum by the instrument beam with healpy
If you are analyzing a map from an instrument with a specific beam width, you can correct the power spectrum by the smoothing factor caused by that beam and obtain a better approximation of the power spectrum of the orignal sky.
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Compute the Planck CMB temperature power spectrum with healpy anafast
import healpy as hp import numpy as np import os import astropy.units as u import matplotlib.pyplot as plt %matplotlib inline