Consider any of the latest maps of the temperature fluctuations of the CMB. Such a map can be considered a 2 dimensional topographical map of the surface of a sphere, high points hotter, low points cooler. Consider the contours that divide such a map into the two regions, fluctuations hotter then the mean and fluctuations colder then the mean.(adsbygoogle = window.adsbygoogle || []).push({});

If we now take a Fourier transform of only the region hotter then mean and compare that with the Fourier transform of the region cooler then the mean are those Fourier transforms very similar, do they have the same statistics if that question makes sense? Do the temperature fluctuations of the CMB considered as a surface have an inversion symmetry about the mean?

Or put another way, if some graduate student inverted the colors on a fluctuation map would anyone notice, would we still have a plausible fluctuations map (exclude the great void)?

I have taken such a map and with Windows Paint app inverted the colors, seems similar, see attached.

Thanks for any help!

**Physics Forums - The Fusion of Science and Community**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Fluctuations of the CMB, symmetry between the hot and cold?

Loading...

Similar Threads - Fluctuations symmetry between | Date |
---|---|

I Light fluctuations and finding exoplanets | Oct 4, 2016 |

Symmetry and models of Symmetry | Aug 28, 2013 |

Half of moon fluctuates in luminosity and hue randomly, why? | Jul 23, 2012 |

Pulsars: fluctuating speed of rotation? | Jan 19, 2012 |

CMB fluctuations related to dark matter and normal matter? | Nov 17, 2010 |

**Physics Forums - The Fusion of Science and Community**