Forging metals with dark matter in dwarf galaxies
Since discovered last year, the origin of a disproportionate amount of extreme heavy elements in a dwarf galaxy has been a mystery. Could it be the work of an invisible hand?
UV Diagnosis: AGNs or Star-Forming Galaxies?
Active galactic nuclei (AGN) and star-formation processes ionize gases around galaxies and the Universe. How can we separate the two to pin down the dominant ionizing sources in the early Universe?
Ancient Stars from the Cosmic Dawn
Astronomers discover direct successors of the first stars in the Milky Way.
Genesis of a Violent End: On the Origin of Type Ia Supernovae
Accretion instabilities driving violent outcome of a merging binary, and its observable signatures.
The Solar Disk baffles in High Energy
Does the Sun shine in high-energy gamma rays? Apparently so, in the form of a halo surrounding itself. But certain features of this gamma-ray halo are perplexing.