Summary:
- The article discusses a study by physicists at the University of California, Riverside that explains the distinctive features of stellar streams, which are long, thin structures of stars that orbit the Milky Way galaxy.
- The researchers used computer simulations to show that the distinctive features of stellar streams, such as their length, width, and density variations, are caused by the gravitational influence of dark matter subhalos, which are small concentrations of dark matter within the larger dark matter halo of the Milky Way.
- The findings provide new insights into the nature of dark matter and its role in shaping the structure of the Milky Way galaxy, and could help astronomers use observations of stellar streams to map the distribution of dark matter in the galaxy.