When we observe galaxies and measure their dark matter halos, we exclude subhaloes from the halo’s mass profile. When we simulate haloes, we include them. But what if we didn’t?
In which cosmologists come up with yet another way to ignore pesky systematics – aka astrophysics!
Tide goes in, dark matter halos come out, today’s authors can simulate that! With separate universe simulations!
How does one go about detecting dark matter-only structures in the Milky Way? Look at velocity corrections of stars far beyond our galaxy, in the Magellanic clouds!
Uncovering promising evidence that may reveal the location of the missing baryonic matter in the universe.
The effects of gas are complicated and challenging to simulate. Today’s paper explores a way to account for gas in cosmological simulations without actually including it!