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The slow death of red galaxies

For most galaxies, the shutdown of star formation was a slow process that took 4 billion years. An analysis of some 27,000 galaxies suggests that 'strangulation' by their environment was the most likely cause. See Letter p.192

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Figure 1: Colours and masses of galaxies.

Images: A. Cattaneo; Source Data: SDSS


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Correspondence to Andrea Cattaneo.

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Cattaneo, A. The slow death of red galaxies. Nature 521, 164–165 (2015).

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