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Constraining Cosmology with Weak Gravitational Lensing

Murphy, Kellen J.
http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1384957353

Abstract Details

2013, Doctor of Philosophy (PhD), Ohio University, Physics and Astronomy (Arts and Sciences).
I present within this dissertation my work in the field of weak gravitational lensing analysis of galaxy clusters, and the use of weak lensing shear for the constraint of cosmological parameters, with an emphasis on analysis and data reduction methodologies which yield science samples sufficient for the constraint of the dark energy equation of state (e.o.s.) parameter, w. This body of work includes the design and implementation of a weak lensing analysis pipeline suitable for Hubble Space Telescope Advanced Camera for Surveys (ACS) optical imaging data. Unfortunately, the narrow field of view of this instrument imposes several observational challenges for a weak lensing analysis; these are overcome by application of principal component analysis, and by coaddition of shear measurements from the many individual tile images which form the ACS mosaic. I also present the first attempt at dark energy constraint using tomographic weak lensing of such high-z clusters. The systematic errors of this tomographic weak lensing technique are explored using a set of simulated galaxy shear measurements. These simulations are designed to test the sensitivities of the tomographic weak lensing measurement to certain systematic errors which bias the cosmological constraint.
Douglas Clowe, Ph.D. (Advisor)
Markus Boettcher, Ph.D. (Committee Member)
David Drabold, Ph.D. (Committee Member)
Jeffrey Dill, Ph.D. (Committee Member)
189 p.
Astronomy; Astrophysics; Physics
cosmology; gravitational lensing; weak lensing; tomography; galaxy clusters

Recommended Citations

Citations

  • Murphy, K. J. (2013). Constraining Cosmology with Weak Gravitational Lensing [Doctoral dissertation, Ohio University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1384957353

    APA Style (7th edition)

  • Murphy, Kellen. Constraining Cosmology with Weak Gravitational Lensing. 2013. Ohio University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1384957353.

    MLA Style (8th edition)

  • Murphy, Kellen. "Constraining Cosmology with Weak Gravitational Lensing." Doctoral dissertation, Ohio University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1384957353

    Chicago Manual of Style (17th edition)

ohiou1384957353
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© 2013, all rights reserved.
This open access ETD is published by Ohio University and OhioLINK.