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Abell 426 (Perseus Cluster)


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Abell 426
Perseus Cluster (ペルセウス座銀河団)
Cluster of Galaxies (銀河団)


別名 (Other names)
NGC 1275 Cluster, LGG 88

星座 (Constellation)
ペルセウス座 (Per) (Perseus)


距離 (Distance)

2億5,000万光年 (250 million light-years)

Abell 426 (Perseus Cluster) is a cluster of galaxies located 250 million light years from the Earth in the constellation Perseus.

Abell 426 (Perseus Cluster) : Picture

Abell 426 (Perseus Cluster)
Abell 426 (Perseus Cluster)
(C) X-ray: NASA/CXC/SAO/E.Bulbul, et al.
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.

Perseus Cluster of Galaxies
The Perseus Cluster of Galaxies
(C) Bob Franke
Here is one of the largest objects that anyone will ever see on the sky. Each of these fuzzy blobs is a galaxy, together making up the Perseus Cluster, one of the closest clusters of galaxies. The cluster is seen through a foreground of faint stars in our own Milky Way Galaxy. Near the cluster center, roughly 250 million light-years away, is the cluster's dominant galaxy NGC 1275, seen above as a large galaxy on the image left. A prodigious source of x-rays and radio emission, NGC 1275 accretes matter as gas and galaxies fall into it. The Perseus Cluster of Galaxies, also cataloged as Abell 426, is part of the Pisces-Perseus supercluster spanning over 15 degrees and containing over 1,000 galaxies. At the distance of NGC 1275, this view covers about 15 million light-years.

Abell 426 (Perseus Cluster) Abell 426 (Perseus Cluster)
Abell 426 (Perseus Cluster)
(C) X-ray: NASA/CXC/SAO/E.Bulbul, et al.
Abell 426 (Perseus Cluster)
(C) NASA/CXC/SAO/E.Bulbul, et al., XMM: ESA
Abell 426 (Perseus Cluster)
Abell 426 (Perseus Cluster)
(C) NASA/CXC/IoA/A.Fabian et al.
Abell 426 (Perseus Cluster)
Abell 426 (Perseus Cluster)
(C) NASA/CXC/IoA/A.Fabian et al.
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Abell 426 (Perseus Cluster) : Movie

A Tour of Perseus
A team of astronomers has used Chandra X-ray Observatory and XMM-Newton to study a large group of galaxy clusters with a surprising result.
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