An explosion at the centre of our Galaxy

A new study led by SIfA professor Joss Bland-Hawthorn shows evidence that a huge explosion occurred at the centre of our Galaxy.  This explosion was so powerful that it could only have come from one thing: the supermassive black hole today lying dormant in the middle of our galaxy, Sagittarius A*. “The black hole, of course, …

The Cannibal Next Door

SIfA Professor Geraint Lewis and his international team,  including with SIfA PhD students Zhen Wen, have unravelled the cannibalistic past of the Andromeda galaxy. This study, published in Nature, analysed globular cluster data from the Pan-Andromeda Archaeological Survey (PAndAS) to reconstruct the times when Andromeda devoured small galaxies to grow its stellar halo.  “By tracing the …

Tiny star behaves like both a sun and a planet

A well-known star is behaving somewhat like a planet, a SIfA-led team has found. PhD candidate Andrew Zic and his collaborators have discovered pulsed radio emission from UV Ceti, a dwarf star with a mass just a tenth of the Sun’s. The emission has a characteristic that until recently has only been seen in radio …