Galaxies expel murkier gas than they take in

Credit: James Josephides, Swinburne Astronomical Productions. The outflow of galaxies is much dirtier than the gas that goes into them, according to research by an international team of astronomers. The research, published in The Astrophysical Journal, examines the ‘accretion’ and ‘outflow’ of galaxies – the atoms that flow in, and the atoms that are eventually … Continue reading Galaxies expel murkier gas than they take in

Hungry galaxies grow fat on their neighbours

Galaxies grow large by eating their smaller neighbours, new research reveals.Exactly how massive galaxies grow so big is poorly understood, not least because they swell over billions of years. Now, a combination of observation and modelling from researchers, led by UNSW’s Anshu Gupta from Australia’s ARC Centre of Excellence for All Sky Astrophysics in 3 … Continue reading Hungry galaxies grow fat on their neighbours