Essays about: "cosmology"

Showing result 1 - 5 of 31 essays containing the word cosmology.

  1. 1. Weak Lensing of Type Ia Supernovae

    University essay from Stockholms universitet/Institutionen för astronomi

    Author : Nicolas Risberg; [2019]
    Keywords : ;

    Abstract : Studying weak gravitational lensing of type Ia supernovae is a valuable tool to have in cosmology. Gravitational lensing may amplify the brightness of the source, affecting the brightness distribution of observed supernovae in a non-Gaussian way. Testing this magnified distribution for normality may thus reveal the observation of weak lensing. READ MORE

  2. 2. Galaxy clusters and cosmic voids in modified gravity scenarios

    University essay from Uppsala universitet/Teoretisk astrofysik

    Author : Sveva Castello; [2019]
    Keywords : Cosmology; galaxy clusters; cosmic voids; f R gravity;

    Abstract : The so-called 'cosmic web', comprising cosmic voids and galaxy clusters, has been proven to be extremely sensitive to deviations from General Relativity. This could be further investigated by future large-scale surveys, such as with the European Space Agency satellite Euclid. READ MORE

  3. 3. Cosmological probes of the early universe with Axions & Gravitational Waves

    University essay from Uppsala universitet/Teoretisk fysik

    Author : Nicklas Ramberg; [2019]
    Keywords : axions; early universe; dark matter; gravitational waves; modified cosmology; cosmic strings; axion; tidigt universum; mörk materia; gravitationsvågor; modifierad kosmologi; kosmiska strängar;

    Abstract : This thesis uses theoretical studies, and numerical simulations to provide results of the experimental reach to detect the QCD axion as dark matter in a Non-standard cosmological background. Assuming that the QCD axion constitutes the full CDM abundance of the universe, this thesis elaborates on its potential detection from experimental setups for the mass window of the axion. READ MORE

  4. 4. Investigating discouraging and encouraging emic reasons to apply eco-efficient farming methods : a participatory study with indigenous small-scale farmers in Ratanakiri, Cambodia

    University essay from SLU/Department of Biosystems and Technology (from 130101)

    Author : Lilian-Marleen Beck; [2018]
    Keywords : agroecology; transdisciplinary research; action research; participative video making; eco-efficiency; cosmology; emic perception; indigenous farmers; small-scale farmer; non adoption of innovations; Ratanakiri; Cambodia;

    Abstract : In 2008 the most extensive evaluation of global agriculture in human history notable named “agriculture at a crossroad” was published, indicating that agroecological small-scale farming systems could be a path to follow in the future in order to secure a sustainable food supply. Yet it is claimed that there is a gap between knowledge regarding the methods used for agroecological farming and its application by farmers. READ MORE

  5. 5. Simple cosmological models and their descriptions of the universe

    University essay from Linköpings universitet/Matematik och tillämpad matematik

    Author : Emil Gustafsson; [2018]
    Keywords : Tensors; General relativity; Einstein s field equations; Cosmology; Friedmann s equation; FLRW-spacetimes; Tensorer; Allmän relativitetsteori; Einsteins fältekvationer; Kosmologi; Friedmanns ekvation; FLRW-rumtider;

    Abstract : Cosmology is the study of the universe as a whole, and attempts to describe the behaviour of the universe mathematically. The simplest relativistic cosmological models are derived from Einstein's field equations with the assumptions of isotropy and homogeneity. READ MORE