Studying dark matter using weak gravitational lensing : from galaxies to the cosmic web

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Studying dark matter using weak gravitational lensing : from galaxies to the cosmic web

Type: Doctoral Thesis
Title: Studying dark matter using weak gravitational lensing : from galaxies to the cosmic web
Author: Brouwer, M.M.
Issue Date: 2017-12-20
Keywords: Gravitational lensing
Galaxies
Cosmic web
Cosmology
Dark matter
Emergent gravity
Abstract: Of all the mass in our Universe, 80% is thought to consist of a hypothetical and invisible substance called dark matter (DM). So far, all observations of DM are based on its gravitational interaction, either through the dynamics of normal (baryonic) matter or through the deflection of light. The latter approach, called ‘gravitational lensing’, is a unique way to probe the distribution of DM without making any assumptions on its dynamical state, and on scales larger than the extent of baryons. Using weak gravitational lensing with the Kilo-Degree Survey (KiDS), we first study the relation between galaxies and their dark matter halos on the scale of individual galaxies and galaxy groups. We then attempt to measure the effect of the local and large scale (cosmic web) density distribution on galaxies and halos, and we measure the interplay between galactic and DM structures at the scale of the cosmic web. Finally, we perform the first test of Verlinde’s theory of Emergent Gravity, all with the ultimate goal of gleaning some insight into the possible nature of the elusive ‘missing mass’.
Promotor: Supervisor: Kuijken K., Hoekstra H.
Faculty: Science
University: Leiden
Uri: urn:isbn:9789462337978
Handle: http://hdl.handle.net/1887/58123
 

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application/pdf Bibliography 174.0Kb View/Open
application/pdf Curriculum Vita ... lications_Acknowledgements 149.8Kb View/Open
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