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HubbleSite Hubble Finds That Dwarf Galaxies Formed More Than Their Fair Share of the Universe's Stars


Space Telescope Science

They may be little, but they pack a big star-forming punch. Hubble astronomers have found that dwarf galaxies in the young universe were responsible for an "early wave" of star formation not long after the big bang. The galaxies churned out stars at a furiously fast rate, far above the "normal" star formation expected of galaxies. Understanding the link between a galaxy's mass and its star-forming activity helps to assemble a consistent picture of events in the early universe.

The international team associated with this study consists of H. Atek (EPFL, Switzerland and Spitzer Science Center, California), J.-P. Kneib (EPFL, Switzerland and CNRS, France), C. Pacifici (Yonsei University Observatory, Republic of Korea), M. Malkan (University of California, Los Angeles), S. Charlot (Institut d'Astrophysique de Paris), J. Lee (STScI), A. Bedregal (Minnesota Institute for Astrophysics), A. Bunker (University of Oxford, UK), J. Colbert (Spitzer Science Center), A. Dressler (Observatories of the Carnegie Institution for Science), N. Hathi (Aix Marseille University, France), M. Lehnert (Institut d'Astrophysique de Paris, France), C. Martin (University of California, Santa Barbara), P. McCarthy (Observatories of the Carnegie Institution for Science), M. Rafelski (Spitzer Science Center), N. Ross (University of California, Los Angeles), B. Siana (University of California, Riverside), and H. Teplitz (Caltech).

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