Modelling shows big galaxies get bigger by merging with smaller ones
Galaxies grow large by eating their smaller neighbours, new research reveals.
Exactly how massive galaxies attain their size is poorly understood, not least because they swell over billions of years. But now a combination of observation and modelling from researchers led by Dr Anshu Gupta from Australia’s ARC Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) has provided a vital clue.[continue reading…]