Sökning: "Ariel Goobar"

Visar resultat 16 - 17 av 17 avhandlingar innehållade orden Ariel Goobar.

  1. 16. The BIG ghost

    Författare :Mikael von Strauss; Kjell Rosquist; Ariel Goobar; Edwin Langmann; Stockholms universitet; []
    Nyckelord :modified gravity; extra dimensions; cosmological constant;

    Sammanfattning : In this thesis we present work done in an analysis of models of brane induced gravity. These are higher dimensional generalizations of Einstein's General relativity where our universe is considered as a brane in a higher dimensional bulk and where the gravitational dynamics on the brane is enhanced. LÄS MER

  3. 17. Extragalactic extinction and spectral properties of Type Ia supernovae

    Författare :Linda Östman; Ariel Goobar; Avishay Gal-Yam; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Type Ia supernovae; cosmology; spectroscopy; dust extinction; quasars; axions; Physics; Fysik; fysik; Physics;

    Sammanfattning : The use of Type Ia supernovae as standardisable candles for probing cosmological parameters with high precision requires good knowledge about how the supernova light is affected along the line of sight and how the intrinsic brightness varies between objects. The work in this thesis addresses these topics. LÄS MER