A substantial fraction of Type II supernovae arise from stars in binary systems, and studying the surrounding population of stars is a powerful way to gauge the likely age and mass of a supernova progenitor star.
A new look at how waves are generated in weakly ionized plasmas suggests that substantial wave flux can be generated even if the way of generating the waves acts only on the few charged particles in the plasma.
“Bare” active galactic nuclei — accreting supermassive black holes with spectra uncomplicated by absorption features — have an unexplained excess of soft (low-energy) X-ray emission.
When an infalling galaxy meets an outward-moving shock wave, it can invert the typical arc-like shape of a radio relic and create a “wrong way” relic instead.
A new study examines the possible connection between a blazar and a neutrino source, using multi-wavelength observations of the blazar to constrain the neutrino production method.
A single transit of the exoplanet WASP-17b across the face of its host star revealed that the planet has a cloudy atmosphere, and those clouds may be composed of small quartz particles.