Peculiar Velocities and Large Scale Flows as Probes of Gravity, ΛCDM and the Growth of Structure over Cosmic Time
| dc.comment.hidden | Both Journals grant free licensees to Authors for all papers published. | en |
| dc.contributor.author | Turnbull, Stephen | |
| dc.date.accessioned | 2012-09-28T18:32:39Z | |
| dc.date.available | 2012-09-28T18:32:39Z | |
| dc.date.issued | 2012-09-28T18:32:39Z | |
| dc.date.submitted | 2013 | |
| dc.description.abstract | Peculiar velocities are possibly the most powerful probes of very large-scale mass density fluctuations in the nearby Universe. When coupled with a density field they also can constrain the growth factor of the universe by measuring the proportionality constant between observed velocities and linear theory predicted velocities. In this thesis, I measure a bulk flow of SN within 20,000 km s^1 of 197 +/- 56 km s^1 in direction l = 295 deg +/- 16deg, b = 11deg +/- 14deg , which is consistent with predictions of ΛCDM for large scale mass density fluctuations. Using the IRAS Point Source Catalog Redshift survey (PSCz) galaxy density field and the SNe peculiar velocities I calculated Ω^55_m σ8 to be 0.40 +/- 0.07 which is in excellent agreement with the results of WMAP7: Ω^55_m σ8 = 0.39 +/-0.04. By combining my measured value of with results from other studies, I measure the growth factor γ to be = 0.621 +/- 0.08 which is consistent with Λ CDM's prediction of 0.55. I conclude by exploring some of the systematic errors that could have affected my measurements of β. I find that when β is measured using a reconstruction method the result can be underestimated by between 7 and 15 %. | en |
| dc.identifier.uri | http://hdl.handle.net/10012/7079 | |
| dc.language.iso | en | en |
| dc.pending | false | en |
| dc.publisher | University of Waterloo | en |
| dc.subject | Gravity | en |
| dc.subject | ΛCDM | en |
| dc.subject | Peculiar Velocities | en |
| dc.subject | Growth of Structure | en |
| dc.subject.program | Physics | en |
| dc.title | Peculiar Velocities and Large Scale Flows as Probes of Gravity, ΛCDM and the Growth of Structure over Cosmic Time | en |
| dc.type | Master Thesis | en |
| uws-etd.degree | Master of Science | en |
| uws-etd.degree.department | Physics and Astronomy | en |
| uws.peerReviewStatus | Unreviewed | en |
| uws.scholarLevel | Graduate | en |
| uws.typeOfResource | Text | en |