Gravitationally lensed image simulations for the study of the substructure in galaxy clusters
Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2005.
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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/1721.1/32913 |
| _version_ | 1826211260789686272 |
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| author | Peeples, Molly S |
| author2 | Paul L. Schechter and Richard Massey. |
| author_facet | Paul L. Schechter and Richard Massey. Peeples, Molly S |
| author_sort | Peeples, Molly S |
| collection | MIT |
| description | Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2005. |
| first_indexed | 2024-09-23T15:03:08Z |
| format | Thesis |
| id | mit-1721.1/32913 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T15:03:08Z |
| publishDate | 2006 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/329132019-04-12T09:12:54Z Gravitationally lensed image simulations for the study of the substructure in galaxy clusters Peeples, Molly S Paul L. Schechter and Richard Massey. 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, 2005. Includes bibliographical references (p. 49-50). As gravitational lensing is susceptible to all gravitating matter-both baryonic and dark-it provides a potentially clean way to study the mass distribution of galaxy clusters. We are particularly interested in the substructure of dark matter in galaxy clusters as it signals constraints on various cosmological parameters as well as cluster evolution. Gravitationally lensed image simulations are needed in order to determine just how much can be learned from current mass reconstruction methods. We present here a comprehensive procedure for generating such a set of simulated images using shapelets (Massey et al. (2005)). These images use a catalog of galaxies from the Hubble Space Telescope data taken as part of the Cosmos Evolution Survey (COSMOS). The background galaxies are then lensed by a 1015M galaxy cluster set at a redshift of z = 0.4. Noise and a point spread function (PSF) can also be added to the images; we chose to emulate the set of COSMOS pointings from the Subaru Telescope. As the shapelets simulation software allows complete freedom over all background galaxy, noise, and PSF parameters, the methods presented here have the potential to be used to not only verify that existing mass reconstruction algorithms work, but also to help optimize specifications on future telescopes. (cont.) We also present a preliminary strong lensing analysis of two noise- and PSF-free simulated images according to the algorithm presented in Diego et al. (2005). We found that while this procedure was able to accurately reproduce the surface mass density profile for radii greater than that of the outermost arcs used in the analysis, it failed in unexpected ways for the inner radii. by Mossy S. Peeples. S.B. 2006-05-15T20:38:51Z 2006-05-15T20:38:51Z 2005 2005 Thesis http://hdl.handle.net/1721.1/32913 62628200 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 50 p. 2701775 bytes 2702443 bytes application/pdf application/pdf application/pdf Massachusetts Institute of Technology |
| spellingShingle | Physics. Peeples, Molly S Gravitationally lensed image simulations for the study of the substructure in galaxy clusters |
| title | Gravitationally lensed image simulations for the study of the substructure in galaxy clusters |
| title_full | Gravitationally lensed image simulations for the study of the substructure in galaxy clusters |
| title_fullStr | Gravitationally lensed image simulations for the study of the substructure in galaxy clusters |
| title_full_unstemmed | Gravitationally lensed image simulations for the study of the substructure in galaxy clusters |
| title_short | Gravitationally lensed image simulations for the study of the substructure in galaxy clusters |
| title_sort | gravitationally lensed image simulations for the study of the substructure in galaxy clusters |
| topic | Physics. |
| url | http://hdl.handle.net/1721.1/32913 |
| work_keys_str_mv | AT peeplesmollys gravitationallylensedimagesimulationsforthestudyofthesubstructureingalaxyclusters |