Using gravitational lens geometry to measure cosmological parameters
Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2004.
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| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2006
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| Online Access: | http://hdl.handle.net/1721.1/32737 |
| _version_ | 1826207733520531456 |
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| author | Dorsher, Susan E. (Susan Elaine), 1982- |
| author2 | Jacqueline N. Hewitt. |
| author_facet | Jacqueline N. Hewitt. Dorsher, Susan E. (Susan Elaine), 1982- |
| author_sort | Dorsher, Susan E. (Susan Elaine), 1982- |
| collection | MIT |
| description | Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2004. |
| first_indexed | 2024-09-23T13:54:07Z |
| format | Thesis |
| id | mit-1721.1/32737 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T13:54:07Z |
| publishDate | 2006 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/327372019-04-12T09:13:35Z Using gravitational lens geometry to measure cosmological parameters Dorsher, Susan E. (Susan Elaine), 1982- Jacqueline N. Hewitt. Massachusetts Institute of Technology. Dept. of Physics. Massachusetts Institute of Technology. Dept. of Physics. Physics. Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2004. Includes bibliographical references (leaves 69-73). We develop a technique for measuring cosmological parameters ([omega]M and w) using gravitational lens geometry, source and lens redshifts, and the velocity dispersion of the lensing galaxy. This technique makes use of the relation [theta][sub]E = 4[pi]... where the critical radius [theta][sub]E and the one-dimensional velocity dispersion of the lensing galaxy [sigma]v are observable and the angular diameter distance ratio D[sub]LS/D[sub]S is related to the source and lens redshifts Z[source] and Z[lens] through the cosmological model. We assess the feasibility of this technique by examining the dependence of that ratio on cosmological parameters, doing a Monte Carlo simulation with a singular isothermal sphere lens galaxy, and estimating the error due to the asymmetry of real lenses. We conclude that the method is feasible with a large lens sample and a nearly circular projected mass distribution. We expect errors of less than 0.1 in [omega]M for a flat universe with a cosmological constant and a lens sample selected so that the axial ratio f > 0.8 for each lens. by Susan E. Dorsher. S.B. 2006-05-15T20:26:26Z 2006-05-15T20:26:26Z 2004 2004 Thesis http://hdl.handle.net/1721.1/32737 56729405 eng M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 73 leaves 2770905 bytes 2773672 bytes application/pdf application/pdf application/pdf Massachusetts Institute of Technology |
| spellingShingle | Physics. Dorsher, Susan E. (Susan Elaine), 1982- Using gravitational lens geometry to measure cosmological parameters |
| title | Using gravitational lens geometry to measure cosmological parameters |
| title_full | Using gravitational lens geometry to measure cosmological parameters |
| title_fullStr | Using gravitational lens geometry to measure cosmological parameters |
| title_full_unstemmed | Using gravitational lens geometry to measure cosmological parameters |
| title_short | Using gravitational lens geometry to measure cosmological parameters |
| title_sort | using gravitational lens geometry to measure cosmological parameters |
| topic | Physics. |
| url | http://hdl.handle.net/1721.1/32737 |
| work_keys_str_mv | AT dorshersusanesusanelaine1982 usinggravitationallensgeometrytomeasurecosmologicalparameters |