Can stellar clusters be host to multiple star formation events? The authors of today’s paper take a closer look…
This month’s undergraduate research post features pulsars as a probe of our galaxy’s magnetic field, and the possibility of asymmetries in supernovae associated with gamma-ray bursts.
The authors identify two distinct sequences of blue straggler stars in the globular cluster NGC 392. They hypothesize that one branch is formed via stellar mergers and the other is binary stars undergoing mass transfer. This is the second globular cluster found to possess this double sequence.
The densest galaxy in the local Universe may have been found. M60-UCD1 is most likely a tidally-stripped remnant of a more massive progenitor galaxy. Strader et al. predicts that the progenitor of M60-UCD1 was ~ 50-200 times more massive, suggesting that it was once an elliptical galaxy that has been stripped of most of its mass.
What kind of star is orbiting around a millisecond pulsar and where did it come from?
In this article, the authors report their serendipitous discovery of two stellar mass-black holes in the globular cluster M22, however theoretical work predicts that there should only be one stellar-mass black hole!