This puzzling result makes sense if one assumes that the boundary stars are feeling the gravitational effects of an unseen mass—dark matter—in a halo around the galaxy. Dark matter could also ...

Models indicate that this decrease is the result of the dark matter halo that is exerting the torque being oblate, or ...

The simulations also showed a difference in the rate at which dark matter halos accrete mass. At low redshifts, w0waCDM halos accrete mass slightly faster than halos in the ΛCDM simulations. At ...

The shape of the spectral line created by axion ... An artist's impression of the dark matter halo (blue) that is believed to surround the Milky Way galaxy. | Credit: ESO/L. Calçada Pinetti ...