How fuzzy is the universe?
How can the first stars tell us about the nature of dark matter?
How can the first stars tell us about the nature of dark matter?
Wiggly rulers don’t seem like good measuring devices, but Velocity-induced Acoustic Oscillations might be an exception.
Less than a month after the first detection of a cosmic 21cm signal by EDGES was published, and hopes are already dwindling for the models of dark matter that were proposed to explain the unexpected signal.
Astronomers have known for a while that GRBs are sign-posts to galaxies which are forming lots of stars. But today’s paper used radio observations of the gas to connect that star formation to a recent merger.
Today’s authors propose that, in addition to the first stars, the first stellar black holes might have contributed significantly to the period of cosmic reionization.