Hunting for stellar splashback: defining the size of a galaxy cluster
How big is a galaxy cluster? Today’s authors use the remnants of destroyed galaxies to define the edge of galaxy clusters.
Tidal tails of dwarf galaxies on different orbits around the Milky Way
A phenomenological series of simulations of dwarf galaxies placed on different orbits around a Milky Way-like galaxy, in order to learn about the properties (and observability) of tidal tails in dwarf galaxies around our Milky Way.
Mixing up gas in the wake of a strangled satellite
Most simulations to date have implied that satellite galaxies traveling through galaxy clusters are stripped of gas for future star formation in a process known as “strangulation”. In contrast, the authors of this paper suggest that satellite galaxies may not be as cut off as some might think: instead, their simulations show that the cooler, stripped gas from the corona will mix with the surrounding intra-cluster medium and remain near the original galaxy as a potential new source of star-forming fuel.
Origin of tidal streams in the M 81 group
The interacting galaxies in the M 81 triplet are interconnected by tidal features. In this work, the authors study dust in the NGC 3077 tidal stream and discuss its implications.