Much more detail on Milky Way
Australian scientists have helped create the most detailed map of the Milky Way, using the world’s largest radio telescopes.
The HI4PI project, which is a combination of an Australian survey and a German survey, provides the most sensitive and detailed view of all of the hydrogen gas in and around the Milky Way and will help solve the mysteries of our galaxy.
Team leader for the Australian survey, Professor Naomi McClure-Griffiths from ANU, said the study revealed for the first time the fine details of structures between stars in the Milky Way.
“Very small gas clouds appear to have helped form stars in the Milky Way over billions of years,” she said.
The data map could be used to answer the big questions about the Milky Way and neighbouring galaxies.
“How does the Milky Way get the new gas it requires to continue forming stars? And where are all of the small dwarf galaxies that must surround our Milky Way? The next steps will be exciting,” Prof McClure-Griffiths said.
The map will also help to hone the Square Kilometre Array and the Australian Square Kilometre Array Pathfinder, which will provide even more detailed maps of the Milky Way.
The HI4PI project used the largest fully steerable radio telescopes in the southern and northern hemispheres, Australia's 64m CSIRO Parkes dish and the 100m Max-Planck telescope in Effelsberg, Germany.
The project improved on a previous neutral hydrogen study, the Leiden-Argentine-Bonn (LAB) survey, by a factor of two in sensitivity and a factor of four in angular resolution.
The team created a video animation that shows all of the hydrogen gas in the Milky Way and neighbouring galaxies, accessible below.