Study: GD-1 Stellar Stream’s Distinctive Features Caused by Self-Interacting Dark Matter Subhalo

Study: GD-1 Stellar Stream’s Distinctive Features Caused by Self-Interacting Dark Matter Subhalo

A core-collapsing self-interacting dark matter subhalo is responsible for the peculiar spur and gap features observed in GD-1, a stellar stream within the Galactic halo of the Milky Way, according to a new study led by University of California, Riverside astronomers.

GD-1 exhibits spur and gap structures that may result from a close encounter with a dense substructure. Image credit: University of California, Riverside.

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