The Milky Way looks nothing like the flat space pancake it is usually depicted as. The newly-created and most accurate 3D map of our galaxy reveals that it’s warped and twisted, and even more fascinating.
A group of astronomers from Australia and China have built their “intuitive and accurate three-dimensional picture” by mapping the so-called “classical Cepheids.”
Burning their fuel quickly, those pulsating stars that live fast and die young are 100,000 times brighter than the Sun. The combination of their pulsation periods and known luminosity allowed the scientists to determine their location with the high accuracy of between 3 to 5 percent.
The coordinates of 1,339 classical Cepheids marked on a 3D map created a twisted and warped galactic disk of our big home.
Using a sample of 1,300+ Classical Cepheids, Chen et al. have probed the extent and the warp of the Galaxy's stellar disk, finding that it follows Brigg's Law for spiral galaxies. https://t.co/GFeD9xY8uV pic.twitter.com/xrMdhCgj2F
— Nature Astronomy (@NatureAstronomy) February 4, 2019
The Milky Way turned out to be progressively twisted in its outer areas, which is most likely caused by the powerful rotating forces released by the galaxy’s massive internal disk, according to the research.
The team had published the results of their work in the Nature Astronomy, saying that their map will be “crucial” in further studies of the kinematics and archaeology of our galaxy.
Source: amazingastronomy.thespaceacademy.org
