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!
These authors describe a novel method to determine the mass-loss rates of massive runaway stars.
What happens to a low-mass companion when a star evolves off the main sequence to become a white dwarf?
Globular clusters are some of the most massive and densest star clusters observed. What are the progenitors of old globular clusters that we see orbiting the Milky Way and other galaxies? What evolutionary and dynamical effects have these clusters experienced? What determines the physical properties of old globular clusters? Why are there two “distinct” classes of globular clusters and what properties determine these physical states? These are the questions the authors aim to answer.
Can the ionizing radiation from massive run-away stars be a leading source of reionization in the early universe?
