A radio and optical view of galaxy NGC 5643 shows the fiery core of a luminous Seyfert galaxy, powered by gas and debris being sucked into a supermassive black hole hidden by vast clouds of dust and debris. It is difficult to probe the shrouded inner regions of a Seyfert galaxy, but researchers using the Atacama Large Millimetre/submillimetre Array – ALMA – and the Multi Unit Spectroscopic Explorer – MUSE – on the Very Large Telescope have captured this view of electrically charged gas being ejected from the black hole’s accretion disk to either side of the core. Cold molecular gas traced by carbon monoxide, seen in red, defines the galaxy’s rotating inner region.
Astronomers have discovered a new kind of galaxy in the early universe, less than a billion years after the Big Bang. These galaxies are forming stars more than a hundred times faster than our own Milky Way. The discovery could explain an earlier finding: a population of surprisingly massive galaxies at a time 1.5 billion years after the Big Bang, which would require such hyper-productive precursors to grow their hundreds of billions of stars.
Astronomers using the Atacama Large Millimetre/submillimetre Array (ALMA) have found the clearest indications yet that planets with masses several times that of Jupiter have recently formed in the discs of gas and dust around four young stars. Measurements of the gas around the stars also provide additional clues about the properties of those planets.