2026-09-20T07:56:34Zhttps://dspace.mit.edu/server/oai/requestoai:dspace.mit.edu:1721.1/409132022-01-13T07:54:41Zcom_1721.1_7582com_1721.1_7581col_1721.1_131024
Edmund Bertschinger.
Scolnic, Daniel (Daniel M.)
Massachusetts Institute of Technology. Dept. of Physics.
Massachusetts Institute of Technology. Department of Physics
2008-03-27T18:22:43Z
2008-03-27T18:22:43Z
2007
2007
http://hdl.handle.net/1721.1/40913
212376979
Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2007.
Includes bibliographical references (leaves 59-60).
The recombination of hydrogen at z ~ 800 - 1800 induces distortions to the Cosmic Microwave Background (CMB) spectrum. We present a careful calculation and analysis of all of the main transitions occurring during this period in order to find the electron density throughout recombination and its dependence on each process. Our original motivation was to analyze the effects that Thomson scattering and resonance scattering will have on recombination. However, while working on the project, we found that first we had to thoroughly account for all of the atomic transitions. We present a new method for solving the system of equations throughout the period of recombination. This method allows us to show the effect of individual processes on the total ionization fraction.
by Daniel Scolnic.
S.B.
60 leaves
eng
Massachusetts Institute of Technology
M.I.T. theses are protected by
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http://dspace.mit.edu/handle/1721.1/7582
Physics.
Solving the system of atomic rate equations during recombination
Thesis
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