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A limit on the inhomogeneity of the cosmic microwave background radiation at an angular scale of 1.25 arcmin


Pigg, Jay Cee (1976) A limit on the inhomogeneity of the cosmic microwave background radiation at an angular scale of 1.25 arcmin. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/RJMF-HZ44.


NOTE: Text or symbols not renderable in plain ASCII are indicated by [...]. Abstract is included in .pdf document. An observational upper limit to the inhomogeneity of the cosmic background radiation of [...]T/T [...] 7.4 x 10[...] on an angular scale of 1.25 arcmin was obtained at a wavelength of 2.0 cm. This and Pariiskii's (1973, Astron. Zh., 50, 453 [Sov. Astron., 17, 291]) limit of [...]T/T [...] 4.8 x 10[...] at 22 arcmin define the observational upper limit to [...]T/T for all scales 1° or less. Constraints are placed on published models of galaxy formation and 1000-Mpc scale clustering. Hypotheses that fluctuations in the background radiation could be caused by random fluctuations in the number of protogalaxies in a given solid angle, and that reionization of the intergalactic medium could be associated with the collapse of protogalaxies are shown to be consistent with the observations. Any discrete source model for the origin of the radiation would require more than 100 times as many sources as there are galaxies.

Item Type:Thesis (Dissertation (Ph.D.))
Degree Grantor:California Institute of Technology
Division:Physics, Mathematics and Astronomy
Major Option:Astronomy
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Moffet, Alan Theodore
Group:Owens Valley Radio Observatory (OVRO), Astronomy Department
Thesis Committee:
  • Unknown, Unknown
Defense Date:27 May 1976
Record Number:CaltechETD:etd-08212008-135114
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:3188
Deposited By: Imported from ETD-db
Deposited On:09 Sep 2008
Last Modified:21 Dec 2019 04:31

Thesis Files

PDF (Pigg_jc_1976.pdf) - Final Version
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