A numerical model matches the Crab Nebula's spectrum and apparent extension while predicting a roughly sixfold larger 1.1-PeV gamma-ray radius when hadronic emission is included.
A semianalytic simulation estimates how spectral deficits and periodic light curves could identify active supermassive binary black holes, with pulsar-timing forecasts offering a second test.
Monthly Notices of the Royal Astronomical Society, Volume 551, Issue 1, September 20265 min read
A catalog from eROSITA's first survey lists 350 possible ultraluminous X-ray sources in HECATE galaxies, but uneven coverage, modeled contamination from active galactic nuclei and unresolved blends limit what it can show.
Astronomy and Astrophysics, 712, A112 (2026)5 min read