Talk:Sunyaev–Zeldovich effect

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Wiki Education Foundation-supported course assignment[edit]

This article was the subject of a Wiki Education Foundation-supported course assignment, between 17 January 2021 and 8 May 2021. Further details are available on the course page. Student editor(s): Rjacobow.

Above undated message substituted from assignment by PrimeBOT (talk) 10:27, 17 January 2022 (UTC)Reply[reply]


We really need to iron out the relevance of the Dirac sea to the SZ effect. This also affects the cosmic microwave background article and to a lesser extent Dirac sea. A NASA site gives a reasonable layman's version of the SZ effect, and I see no relation between the process outlined here and the concept of a Dirac sea. The electrons involved in the SZ effect are not in a Dirac sea negative energy state.

Furthermore a quick Google doesn't reveal anything helpful to link the Dirac sea to the SZ effect, other than Wikipedia/Wikipedia-based articles. Nor can I track down an article with both 'Sunyaev' and 'Dirac' in the abstract on arXiv, or anything similar.

Reddi, can you point us to a good reference on the link between the SZ effect and the Dirac Sea? I'm remerging some of my less contentious minor changes into the main article now, anyway (things like the spelling of 'phenomena'). --EddEdmondson 09:44, 25 Mar 2004 (UTC)

Removing references to the sea again --EddEdmondson 15:29, 26 Mar 2004 (UTC)

confused paragraph[edit]

i've shifted this paragraph to the discussion page, because it's unclear what it's trying to add to the above paragraph. If there is any meaningful content, please try again... Boud 15:18, 26 Oct 2004 (UTC)

High energy of the negative particles cause photons to receive energy. The background radiation's isotropy, such that of a plasma state in all directions, increases this induction. The plasmas of galaxies scatters the cosmic background radiation and relatively distort the background spectrum, thus contributing to statistical uncertainties. This Compton effect between the photons and electrons alters the CMB spectrum observed. When investigated, the Compton effect between the "photons" and the "electrons" alters the spectrum observed by the detectors, though the detectors are not sensitive enough for the small scale SZ effect.

velocity fields[edit]

research on very large scale velocity fields has been carried out

This might be true, but i've never heard of the SZ effect being used to measure velocity fields. Please provide a reference to back this up and then we can put it back in the article. The measurement of a few velocities does not constitute measuring a field of velocities. Boud 15:18, 26 Oct 2004 (UTC)

irrelevant external links[edit]

i fail to see any connection between Critical Velocity in 3He-B Vibrating Wire Experiments as Analog of Vacuum Instability in a Slowly Oscillating Electric Field and the SZ effect, so i removed it.

Topological Defects in the Cosmos and Lab also has no relation to SZE Boud 15:18, 26 Oct 2004 (UTC)

Peebles and Ratra is a cool article :), but i don't see much link with SZE

SZ spectrum[edit]

It would be very useful to include a plot of the (characteristic and unique) SZ spectrum, including the fact that the thermal SZ effect has a null at 217GHz. —The preceding unsigned comment was added by (talk) 07:52, 5 March 2007 (UTC).Reply[reply]

Additional article?[edit]

If someone would care to add the following to the bibliography, and perhaps summarize its findings in the article briefly. Thx. I'd do it myself, but am not yet well versed in how to properly annotate citations on WP. Also, not all that well versed in the physics of it, but someone said it would make a good reference for a balanced article... So, I'll leave it to the other more active editors' discretion.

(Anomalous SZ contribution to 3 year WMAP data.) Mgmirkin 00:56, 21 March 2007 (UTC)Reply[reply]


I think the reference to the Ostriker-Vishniac effect is not the good one. There were two papers by them that year, and the "Effect of gravitational lenses on the microwave background, and 1146+111B,C" does not seem to have a link with the SZ effect. On the contrary, the following article : "Generation of Microwave Background Fluctuations from Nonlinear Perturbations of the Era of Galaxy Formation" seems to fit the bill. Also, this second article is much more cited (see citation history on ADS) than the gravitational lens one. (talk) 17:41, 30 July 2013 (UTC)Reply[reply]