Search Publications
A highly magnified star at redshift 6.2
Mahler, Guillaume; Anderson, Jay; Broadhurst, Tom +26 more
Galaxy clusters magnify background objects through strong gravitational lensing. Typical magnifications for lensed galaxies are factors of a few but can also be as high as tens or hundreds, stretching galaxies into giant arcs1,2. Individual stars can attain even higher magnifications given fortuitous alignment with the lensing cluster. …
Gigaelectronvolt emission from a compact binary merger
Campana, Sergio; Salafia, Om Sharan; Giarratana, Stefano +9 more
An energetic γ-ray burst (GRB), GRB 211211A, was observed on 11 December 20211,2. Despite its long duration, typically associated with bursts produced by the collapse of massive stars, the observation of an optical-infrared kilonova points to a compact binary merger origin3. Here we report observations of a significant (more …
X-ray astronomy comes of age
Wilkes, Belinda J.; Schartel, Norbert; Santos-Lleo, Maria +1 more
The Chandra X-ray Observatory (Chandra) and the X-ray Multi-Mirror Mission (XMM-Newton) continue to expand the frontiers of knowledge about high-energy processes in the Universe. These groundbreaking observatories lead an X-ray astronomy revolution: revealing the physical processes and extreme conditions involved in producing cosmic X-rays in obje…