Ten times more hyper-luminous galaxies observed than stars can produce

A team of astronomers led by SRON Netherlands Institute for Space Research has observed 10 times more hyper-luminous galaxies in the infrared than stars can produce according to the models. If the theory is correct, it means that stars alone cannot account for the brightness of the most luminous infrared galaxies. The paper was published in a special issue of Astronomy & Astrophysics.