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A measurement of the Sunyaev-Zeldovich effect in the coma cluster of galaxies


Herbig, Thomas (1994) A measurement of the Sunyaev-Zeldovich effect in the coma cluster of galaxies. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/3wd8-xa84.


This thesis presents a measurement of the Sunyaev-Zeldovich effect in the Coma cluster of galaxies. The observed effect is ΔT[subscript 0,obs] = -302.1±48μK, and was measured at a frequency of 32GHz with the 5.5m telescope at the Owens Valley Radio Observatory. Interpreted in the context of existing X-ray models, I derive a peak central SZ effect of ΔT[subscript 0,peak] = -495.3±78.7µK. With this interpretation, I also calculate a value of H[subscript 0] = 74.2±27.9kms[superscript -1]Mpc[superscript -1] for the Hubble constant. This is the first successful measurement of the SZ effect in a nearby cluster, an important advance because of the much better potential for its astronomical and cosmological interpretation.

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):
  • Readhead, Anthony C. S.
Group:Astronomy Department
Thesis Committee:
  • Unknown, Unknown
Defense Date:20 September 1993
Record Number:CaltechETD:etd-09102008-151722
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:3446
Deposited By: Imported from ETD-db
Deposited On:16 Sep 2008
Last Modified:05 Nov 2021 22:41

Thesis Files

PDF (Herbig_th_1994.pdf) - Final Version
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