Add 'Constraining Warm Dark Matter With Cosmic Shear Power Spectra'

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Blanca Springthorpe 4 weeks ago
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      Constraining-Warm-Dark-Matter-With-Cosmic-Shear-Power-Spectra.md

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Constraining-Warm-Dark-Matter-With-Cosmic-Shear-Power-Spectra.md

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<br>We examine potential constraints from cosmic shear on the dark matter particle mass, assuming all darkish matter is made up of light thermal relic particles. Given the theoretical uncertainties concerned in making cosmological predictions in such warm darkish matter scenarios we use analytical fits to linear warm dark matter [cordless power shears](https://brogue.wiki/mw/index.php?title=User_talk:MichelleMondalmi) spectra and compare (i) the halo mannequin utilizing a mass perform evaluated from these linear power spectra and (ii) an analytical fit to the non-linear evolution of the linear energy spectra. We optimistically ignore the competing impact of baryons for this work. We discover method (ii) to be conservative compared to method (i). We evaluate cosmological constraints utilizing these methods, marginalising over 4 different cosmological parameters. Using the extra conservative method we discover that a Euclid-like weak lensing survey along with constraints from the Planck cosmic microwave background mission main anisotropies might achieve a lower restrict on the particle mass of 2.5 keV.<br>
<br>Within the second half of the twentieth century, two competing theories for the growth of cosmological structure have been proposed. In the chilly dark matter (CDM) paradigm (Peebles (1982)
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