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Simulation Pipeline for Velocity Field Measurements using the Kinetic Sunyaev-Zel'dovich Effect


Su, Yubo (2016) Simulation Pipeline for Velocity Field Measurements using the Kinetic Sunyaev-Zel'dovich Effect. Senior thesis (Major), California Institute of Technology. doi:10.7907/727E-BW81.


The kinetic Sunyaev-Zel 'dovich (kSZ) effect is of great cosmological interest for providing precision measurements of peculiar velocity fields independent of systematics present in other cosmological probes. The high precision kSZ measurements on the horizon are expected to yield valuable constraints distinguishing between competing cosmological models. Instrumental to kSZ astromony is the removal of contaminating point sources, primarily radio and dusty, star-forming galaxies that have bright emissions in kSZ spectral bands. As the precision of measurements improve, the source removal residuals may become significant contributions to the overall kSZ error budget. A full simulation is essential to characterizing these induced errors. This study develops a procedure for contamination removal from first principles, verifying its optimality against information theoretic limits. Models for contaminating sources of increasing complexity are considered, at each step characterizing the optimality of the subtraction compared to theoretical bounds. The final, currently unfinished objective is to apply this subtraction procedure to a realistic source distribution and understand the incurred systematics.

Item Type:Thesis (Senior thesis (Major))
Subject Keywords:Physics and Computer Science
Degree Grantor:California Institute of Technology
Division:Physics, Mathematics and Astronomy
Major Option:Physics
Minor Option:Computer Science
Thesis Availability:Not set
Research Advisor(s):
  • Golwala, Sunil
Group:Astronomy Department
Thesis Committee:
  • None, None
Defense Date:18 May 2016
Record Number:CaltechTHESIS:01102018-113943698
Persistent URL:
Su, Yubo0000-0001-8283-3425
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:10637
Deposited By: Joy Painter
Deposited On:11 Jan 2018 00:10
Last Modified:08 Nov 2022 00:07

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