Hunting for Stellar Streams
A newly discovered stellar stream may be the long-searched for tidal debris from the Milky Way’s largest globular cluster.
Can we a-void the Hubble tension with local voids?
Cosmologists revisit an idea for addressing the Hubble tension: that a local void is messing with our measurements along the cosmic distance ladder.
Connecting galaxy properties to their star-formation histories
Star-forming galaxies form stars at different rates. Could this be the model that reveals the underlying physics?
Where Did All the Dark Matter Go?
The discovery of a second dark matter deficient galaxy by van Dokkum et al. has caused the debate on galaxies lacking dark matter to resurface.
Small, but Mighty! A galaxy robbed of its stars but contains a supermassive secret.
Today’s post looks at the investigation of a very small galaxy hosting a black hole that’s 15% of its total mass. This paper investigates whether this was once a much bigger galaxy, but has been robbed of its stars by a close call with another nearby galaxy.
Satellites of satellites should exist. Let’s go look for them.
Today’s paper makes predictions for the yet-to-be-observed dwarf galaxy population around Andromeda’s satellite galaxy, M33. It provides scientific justification for a future mission with WFIRST.