Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Supernova Cosmology in an Inhomogeneous Universe
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science. (Cosmology, Particle Astrophysics and String Theory (CoPS))
2010 (English)Independent thesis Advanced level (degree of Master (Two Years)), 30 credits / 45 HE creditsStudent thesis
Abstract [en]

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.
Keyword [en]
Inhomogeneous Cosmology, Supernovae, Type Ia Supernova, Dark Energy, Accelerated Expansion, Accelerated Universe, Inhomogeneous Universe, Monte Carlo, Ray Tracing
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:su:diva-42162OAI: oai:DiVA.org:su-42162DiVA: diva2:346329
Presentation
2010-04-23, A5:1041, Albanova University Center, Stockholm, 10:30 (English)
Uppsok
Physics, Chemistry, Mathematics
Supervisors
Examiners
Available from: 2010-08-31 Created: 2010-08-18 Last updated: 2010-09-06Bibliographically approved

Open Access in DiVA

fulltext(9241 kB)576 downloads
File information
File name FULLTEXT01.pdfFile size 9241 kBChecksum SHA-512
6c71098592bbcfacc5aa8a507d6c14f7329710a445325fe79b1ad76394c4970aa8443bf97581bb65dbd97e6d80a4be346c1cce9aa39b88b537443da4679fb05a
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Gupta, Rahul
By organisation
Department of PhysicsFaculty of Science
Astronomy, Astrophysics and Cosmology

Search outside of DiVA

GoogleGoogle Scholar
Total: 576 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 279 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf