Still Missing Dark Matter: KCWI High-Resolution Stellar Kinematics of NGC1052-DF2

11 Mar 2019 Danieli Shany van Dokkum Pieter Conroy Charlie Abraham Roberto Romanowsky Aaron J.

The velocity dispersion of the ultra diffuse galaxy NGC1052-DF2 was found to be $\sigma_{\rm gc}=7.8^{+5.2}_{-2.2} \ \mathrm{kms^{-1}}$, much lower than expected from the stellar mass -- halo mass relation and nearly identical to the expected value from the stellar mass alone. This result was based on the radial velocities of ten luminous globular clusters that were assumed to be associated with the galaxy... (read more)

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  • ASTROPHYSICS OF GALAXIES