Editor's Summary
14 July 2005
Gas leak
Galaxy formation is thought to involve the cooling of gas in dark-matter haloes collapsing under the influence of gravity and the expansion of the Universe. Cosmologists have a problem with this model though: it produces too many bright galaxies. Unless, that is, young galaxies eject large amounts of gas in the form of high-speed outflows. A new technique, integral field spectroscopy has now been used to gather the best evidence yet that such processes actually occur.
Letter: The discovery of a galaxy-wide superwind from a young massive galaxy at redshift z 
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R. J. Wilman, J. Gerssen, R. G. Bower, S. L. Morris, R. Bacon, P. T. de Zeeuw and R. L. Davies
doi: 10.1038/nature03718