Strange behavior in the galaxy cluster

Abell 520 have shown that the behavior of dark matter may not be so naive. Original observations found that the kernel was a banker in dark matter and hot gas, but did not contain luminous galaxies, which normally would be in the same position as the dark matter. The X-ray Observatory NASA's Chandra detected the hot gas. Astronomers used the telescope Canada-France-Hawaii and Subaru, on the summit of Mauna Kea,


to reason the position of dark matter by measuring how light mysterious substance curved background of more remote galaxies, an effect known as a lens gravity.The astronomer then used the Wide Field Planetary Camera 2 of Hubble to help with his cosmic problem. Instead, to their chagrin, the Hubble observations helped substantiate its first discovery. The astronomer used Hubble to map the cluster's dark matter through gravitational Lansing technique.

"The observations like Abell520 is a humbling in the sense that, despite all the leaps in our experience, over and over again we stand on thin," says Arif Babul, University of Victoria in British Columbia tebanquero senior team. Abell 520 is a rarity e error in the description of the dominant dark matter? Jee believes that it is too early to say. "We know about six samples of galaxy clusters collide at high speed which has been mapped dark matter," said Jee. "But the Bullet Cluster and Abell 520 are the two that show the clearest evidence of recent mergers, and are inconsistent with each other. There is no theory to explain the different behavior of dark matter in these collisions. We need more examples. "