Microwave Backround Fluctuations due to the Sunyaev Zeldovich effect in Pancakes

Details Microwave Backround Fluctuations due to the Sunyaev Zeldovich effect in Pancakes Microwave Backround Fluctuations due to the Sunyaev Zeldovich effect in Pancakes

May 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aas...180.5001s&link_type=abstract

American Astronomical Society, 180th AAS Meeting, #50.01; Bulletin of the American Astronomical Society, Vol. 24, p.811

Astronomy and Astrophysics

Astronomy

Scientific paper

We calculate distortions in the microwave backround radiation from the Sunyaev Zeldovich effect. We consider the fluctuations produced by hot gas in large ( ~ 100Mpc) pancakes. The large scale distribution of the pancakes is taken to be that of a Voronoi foam. We estimate fluctuations for this scenerio to be on the order of {{Delta T} / {T}} ~ a few times 10(-5) . Using computer simulations we produce several 32deg times 32deg images with 0.25deg resolution. These images show characteristic linear features produced when a pancake is viewed nearly edge on. By calculating the two-point and a degenerate three-point correlation function we are able to statistically detect such features even in the presence of a relatively large amount of gaussian noise. The degenerate three-point correlation function is particularly useful since it is insensitive even to noise which is correlated with itself. We also smooth our data over a 7deg FWHM gaussian window to simulate the COBE observations. We find that under such low-resolution conditions the features are highly suppressed.

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