Our "heartless" Milky Way steals stars in nearby galaxies
A new study by the Harvard-Smithsonian Center for Astrophysics suggests that some of the 11 most distant from us the stars in our galaxy located at a distance of 300 000 light-years from Earth, is likely to have been stolen from nearby dwarf galaxy Sagittarius. This is the second closest to our own Milky Way galaxy, which makes her the perfect victim to commit the crime of space, scientists claim.
Postgraduate Marion Dierickx and her mentor, the famous Harvard theorist and astrophysicist Abraham Loeb, investigated this issue through computer simulation model, taking into account the changes made to them motion (speed, direction and other) characteristics of a dwarf galaxy Sagittarius for the last 8 billion years . The researchers found that Sagittarius galaxy is actually a satellite of our Milky Way galaxy. As she circled around our galaxy, its gravitational dominance she managed to steal it 5 stars. In this case, the remaining 6 most remote in our galaxy of stars are likely to have been stolen from another nearby dwarf galaxy.
in the computer models Dierickx time is not spared the galaxy Sagittarius. In the end, she lost almost one third of its stars, as well as almost 90 percent of its dark matter, which callously stolen Milky Way.
Dierickx and Loeb hopes that the project Sloan Digital celestial viewing at Apache Point Observatory in New Mexico, as well as the Large Synoptic Survey Telescope (LSST), whose construction will be completed soon at Mount Gray Pachon in Chile, will help find more stolen Milky Way stars.