Supernova Cosmology in an Inhomogeneous Universe
Independent thesis Advanced level (degree of Master (Two Years)), 30 credits / 45 HE creditsStudent thesis
The propagation of light beams originating from synthetic ‘Type Ia’ supernovae, through an inhomogeneous universe with simpliﬁed dynamics, is simulated using a Monte-Carlo Ray-Tracing method. The accumulated statistical (redshift-magnitude) distribution for these synthetic supernovae observations, which is illustrated in the form of a Hubble diagram, produces a luminosity proﬁle similar to the form predicted for a Dark-Energy dominated universe. Further, the amount of mimicked Dark-Energy is found to increase along with the variance in the matter distribution in the universe, converging at a value of ΩX ≈ 0.7.
It can be thus postulated that at least under the assumption of simpliﬁed dynamics, it is possible to replicate the observed supernovae data in a universe with inhomogeneous matter distribution. This also implies that it is demonstrably not possible to make a direct correspondence between the observed luminosity and redshift with the distance of a cosmological source and the expansion rate of the universe, respectively, at a particular epoch in an inhomogeneous universe. Such a correspondences feigns an apparent variation in dynamics, which creates the illusion of Dark-Energy.
Place, publisher, year, edition, pages
2010. , 83 p.
Inhomogeneous Cosmology, Supernovae, Type Ia Supernova, Dark Energy, Accelerated Expansion, Accelerated Universe, Inhomogeneous Universe, Monte Carlo, Ray Tracing
Astronomy, Astrophysics and Cosmology
IdentifiersURN: urn:nbn:se:su:diva-42162OAI: oai:DiVA.org:su-42162DiVA: diva2:346329
2010-04-23, A5:1041, Albanova University Center, Stockholm, 10:30 (English)
UppsokPhysics, Chemistry, Mathematics
Mörtsell, Edvard, Associate Professor
Goobar, Ariel, ProfessorJon-And, Kerstin, Professor