Thursday, May 07, 2009

Astronomy in Mexico

From all the physical sciences groups in Mexico I consider the astronomers as the ones with more international presence now.

I am happy to report a very interesting discovery (below) by Japanese, American, and Mexican astronomers, published today in Nature.

There is a structure in the very old region of the Universe with possible formation of clusters of galaxies, protoclusters.

These scientists state:

"this may be the largest protocluster yet detected at high redshift."

This is how they end their article:

"These results provide evidence in favour of the synchronous formation of two very different types of high-redshift star-forming galaxy, SMGs and Lyα emitters, within the same cosmic structure. Although the formation process of SMGs is not yet fully understood, the observational evidence shown here suggests that they may form preferentially in regions of high mass concentration, which is consistent with predictions from the standard model of hierarchical structure formation26,27: we are presumably observing a galaxy-formation site where large-scale accumulation of baryonic matter is occurring within the large dark matter halo. Millimetre/submillimetre interferometric identifications followed by accurate measurements of the SMG redshifts will allow us to investigate this further."

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