Simulated universe spawns the whole array of galaxies
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Frame from video of Universe simulation showing several spiral galaxies, an elliptical galaxy, and a peculiar galaxy (Image: Harvard-Smithsonian Center for Astrophysics)
The striking spiral structure of galaxy M81 in the Big Dipper (Photo: NASA)
Left shows galaxies from AREPO simulation, right shows actual galaxies from Hubble image (Image: Harvard-Smithsonian Center for Astrophysics and NASA)
Left shows galaxies from AREPO simulation, right shows actual galaxies from BHubble image (Image: Harvard-Smithsonian Center for Astrophysics and NASA)
Colliding galaxies as simulated by GADGET (top) and AREPO (bottom). Note the greater production of elongated structures with angular momentum in the AREPO simulation (Image: Harvard-Smithsonian Center for Astrophysics)
Comparison between the same galaxy resulting from an AREPO simulation (left) and a Gadget simulation (right). While the large scale structure in which the galaxy is located is similar, the structure of the galaxy itself is quite different (Image: Harvard-Smithsonian Center for Astrophysics)
Universe simulations which demonstrate that the cosmic filament and halo structures are nearly the same in AREPO and GADGET simulations (Image: Harvard-Smithsonian Center for Astrophysics)
Gas density projections of galaxies from the AREPO and GADGET universe simulations (Image: Harvard-Smithsonian Center for Astrophysics)
Stellar density projections of galaxies from the AREPO and GADGET universe simulations (Image: Harvard-Smithsonian Center for Astrophysics)
Article Summary
A new approach for simulating the birth and evolution of galaxies and cosmic filaments within the Universe has been developed by researchers at the Harvard-Smithsonian Center for Astrophysics together with their colleagues at the Heidelberg Institute for Theoretical Studies. It's called AREPO, and has been used to simulate the evolution of our Universe from only 380,000 years after the Big Bang to the present. The full variety of spiral, elliptical, peculiar, and dwarf galaxies appear in the simulated Universe.
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