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Researchers reveal insights into the nature of an extremely massive galaxy cluster

Bringing some of the mysteries of the universe a little closer to home.

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Owlscrying
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Unread post Tue Oct 24, 2017 2:20 pm

New observations carried out by an international team of astronomers have provided important details about an extremely massive galaxy cluster named PLCK G287.0+32.9. The results of these observations, presented October 6 in a paper published on arXiv.org, reveal insights into the structure and mass distribution of this cluster.

PLCK G287.0+32.9 was detected by ESA's Planck telescope in 2011. First observations revealed that it is an extremely massive galaxy cluster at redshift of 0.39 with a mass of approximately 1.57 quadrillion solar masses. Subsequent studies of PLCK G287.0+32.9 found a pair of giant radio relics towards this cluster.

Radio relics are diffuse, elongated radio sources of synchrotron origin. They occur in the form of spectacular single or double symmetric arcs at the peripheries of galaxy clusters. These sources are believed to originate in acceleration and re-acceleration at merger shocks. Thus, in the case of PLCK G287.0+32.9, radio relics confirmed that it is a merging galaxy cluster.

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Owlscrying
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Unread post Tue Oct 24, 2017 2:21 pm

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Image Credit: Finner et al., 2017.

Color-composite Subaru image with enhanced radio (green) and X-ray (red) emissions. Radio emissions are from GRMT observations (Bonafede et al. 2014) and X-ray emissions are from XMM-Newton. The overlaid convergence contours (white) peak in the X-ray emitting ICM with the highest contour enveloping the BCG. The mass is distributed along a direction similar to the axis connecting the radio relics. The HST F814W pointing is outlined in light blue.

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Owlscrying
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Unread post Tue Oct 24, 2017 2:22 pm



A group of U.S. astronomers, including those from the University of Missouri and MIT, used data from three of NASA's Great Observatories to study the most massive cluster ever found in the early universe.

 

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