Research Highlights | Published:

Cosmology: No ring or reason

Nature volume 459, page 13 (07 May 2009) | Download Citation

Subjects

A new study raises questions about the ring of dark matter reported to exist inside a galaxy cluster.

The cluster, called Cl0024+17, is actually thought to be two merging clusters, and some suggest that the ring was caused by their collision. To test the idea, John ZuHone, now at the Harvard-Smithsonian Center for Astrophysics in Cambridge, Massachusetts, and his colleagues simulated cluster collisions under varying conditions. They could not produce a ring unless the dark-matter particles had circular orbits.

Because such orbits are unlikely to occur in galaxy clusters, the results suggest that the ring report is questionable, says ZuHone.

About this article

Publication history

Published

DOI

https://doi.org/10.1038/459013b

Authors

    Comments

    By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.

    Newsletter Get the most important science stories of the day, free in your inbox. Sign up for Nature Briefing