Figure 1 : Star formation cut short.

From: Elemental abundances across cosmic time

Figure 1

Kriek et al.1 have studied a massive galaxy in the early Universe that formed stars over a relatively short period. The quenching of star formation that occurs after this period could have been caused by feedback from the supermassive black hole at the centre of the galaxy, which would have expelled the surrounding interstellar gas and prevented new stars from forming. Shown here is a simulation of such a galaxy, including the feedback effect (see text). The colours represent the temperature of gas from low (blue) to high (red). Image: Philip Taylor and Chiaki Kobayashi