Lensed Substructures
Many dark galaxies may be hiding unseen in the universe—but we still might be able to detect them. Here’s how.
Digging into the Core: Dark Matter and Dwarf Galaxies
Dark matter dominated dwarf spheroidal galaxies are some of the best places to test predictions on how dark matter behaves in the Universe. Predictions for how the dark matter should be distributed in these galaxies disagrees with what is actually observed, however. The authors of today’s Astrobite investigate how the dark matter profiles may evolve over time from what is predicted to what we see today.
The Labor of Outflows against Dark Matter Halo
Dark matter permeates the Universe and surrounds every galaxies in the form of dark matter halos. We don’t really know dark matter works, as predictions of standard cosmology, Lambda Cold Dark Matter (ΛCDM), are way off from observations. Is this the death of Cold Dark Matter, or there are something more to it?
Searching for a dwarf
How small and faint can galaxies get? The authors of this paper report on the discovery of a dwarf galaxy in the Sculptor group.