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More Images of Perseus Cluster
1
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Click for large jpg Chandra+ XMM full field
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X-ray Images of Perseus Galaxy Cluster
A new study of the Perseus galaxy cluster, shown in these images from Chandra and XMM-Newton has revealed a mysterious X-ray signal in the data. This signal is represented in the circled data points in the inset, which is a plot of X-ray intensity as a function of X-ray energy. The signal is also seen in over 70 other galaxy clusters using XMM-Newton. This unidentified X-ray emission line - a spike of intensity centered on about 3.56 kiloelectron volts - requires further investigation to confirm both the signal's existence and nature. One possibility is this signal is from the decay of sterile neutrinos, one proposed candidate to explain dark matter.
(Credit: Chandra: NASA/CXC/SAO/E.Bulbul, et al.; XMM: ESA)

2
XMM gallery of galaxy clusters
A gallery of XMM-Newton images of 73 galaxy clusters, showing X-ray emission from hot gas. The X-ray spectra of these 73 galaxy clusters were "stacked" (added to each other), revealing a mysterious emission line.

Return to Perseus Cluster (June 23, 2014)